Plain-language summary. Use Lengio for personal language learning. Don't copy, scrape, or reverse-engineer the App. Purchases are processed by Apple under Apple's refund policy. The App is provided as is. Disputes are resolved by informal negotiation first and then, where allowed, by binding individual arbitration on a non-class basis. You can stop using the App and uninstall it at any time.
These Terms include important provisions about arbitration and a class-action waiver. Please read them carefully.
These Terms of Use ("Terms") form a legally binding agreement between you and Lengio ("Lengio", "we", "us", or "our") governing your access to and use of the Lengio mobile application (the "App"), the lengio.app website (the "Site"), and any related services we provide (together, the "Services").
By downloading, installing, accessing, or using the Services, you confirm that you have read, understood, and agree to be bound by these Terms and our Privacy Policy, which is incorporated here by reference. If you do not agree, you must not use the Services.
These Terms also apply to anyone who accesses the Services on your behalf.
You must be at least 13 years old, or the minimum age of digital consent in your jurisdiction (16 in some EU member states), to use the Services. If you are under 18 (or the age of majority where you live), you confirm that a parent or legal guardian has reviewed these Terms and agrees to them on your behalf.
By using the Services you also represent that you are not located in, or a national or resident of, a jurisdiction subject to comprehensive sanctions by your home country, and that you are not on any restricted-parties list (see Export Controls).
Lengio is a vocabulary-learning application that pairs words in your target language with images, native-speaker audio, and example sentences, and includes an optional AI speech-partner feature that lets you practise spoken conversations with an AI tutor. Core vocabulary review functions locally on your device once language packs are downloaded; the AI speech partner, language-pack downloads, in-app purchases, and App Store updates require an internet connection.
Features, content, and availability of the Services may change over time. We make no commitment that any particular feature will remain available indefinitely.
Subject to your compliance with these Terms, Lengio grants you a personal, limited, non-exclusive, non-transferable, non-sublicensable, revocable licence to download and use the App on an Apple-branded device that you own or control, for your own personal, non-commercial language-learning purposes.
This licence is for use of the App in object-code form only. We retain all rights, title, and interest in and to the App not expressly granted to you under these Terms.
You may not, and you may not permit any third party to:
This licence terminates automatically if you breach any of these Terms (see Termination).
Lengio does not require you to create an account. Your vocabulary progress, bookmarks, statistics, personal photos, and preferences are stored locally on your device. Because we do not hold this information, we cannot recover, restore, or transfer it if it is lost — for example, after uninstalling the App, factory-resetting your device, or losing access without an iCloud backup.
You are responsible for keeping a backup (typically via iCloud Backup, which is managed by Apple) if continuity of your data matters to you. See the Privacy Policy for details.
"User Content" means any content you provide to or through the Services, including photos you attach to vocabulary entries and the content of any support correspondence.
Ownership. You retain all ownership rights in your User Content. Personal photos you attach inside the App stay on your device.
Limited license to us. Only where you transmit User Content to us — for example by emailing screenshots to support — you grant us a worldwide, non-exclusive, royalty-free, sublicensable, revocable licence to host, store, reproduce, and use that content solely as necessary to respond to your request, deliver the Services, comply with law, or enforce these Terms. Photos you attach inside the App but do not send to us are not covered by this licence because we never receive them.
Your warranties. You represent and warrant that you own or have all rights necessary to share any User Content you submit to us, and that the content does not infringe any third-party rights or violate any law.
Removal. You may withdraw User Content from our possession at any time by requesting deletion from support@lengio.app. We may also remove content that we believe violates these Terms or applicable law.
You agree to use the Services only for lawful purposes and in compliance with these Terms. You will not, and will not attempt to:
We may investigate suspected violations and take any action we consider appropriate, including suspending or terminating your access (see Termination) and cooperating with law-enforcement authorities.
All rights, title, and interest in and to the Services — including the software, design, user interface, vocabulary data, illustrations, photography, audio recordings, the "Lengio" name and logo, and all related trademarks — are and will remain the exclusive property of Lengio and its licensors. The Services are protected by copyright, trademark, and other intellectual-property laws of the United States, the European Union, the United Kingdom, and other jurisdictions.
Nothing in these Terms transfers any intellectual-property rights to you, except the limited licence in Section 4. Any unauthorised use of our marks, logos, or content is strictly prohibited.
If you send us suggestions, ideas, feature requests, or other feedback ("Feedback"), you grant us a perpetual, worldwide, royalty-free, sublicensable, irrevocable licence to use the Feedback for any purpose without any obligation or compensation to you. We are free to use Feedback even if it is similar to ideas we develop independently.
The App may offer optional paid content, features, or subscriptions ("In-App Purchases"). All In-App Purchases are sold, delivered, and managed by Apple through the App Store. Your purchase is therefore subject to Apple's Media Services Terms and any applicable subscription terms shown at the point of sale, in addition to these Terms.
Subscriptions. If you subscribe to a Lengio subscription:
Price changes. We may change the price of paid content or subscriptions at any time. Price changes to active subscriptions take effect at the start of the next billing period and will be communicated as required by Apple's policies and applicable law. Existing one-off purchases are not retroactively re-billed.
Taxes. Prices may include applicable VAT, sales tax, or other levies. Apple collects and remits these where applicable.
Refunds for In-App Purchases are administered by Apple under Apple's refund policy. We do not have the ability to issue or reverse charges. To request a refund, visit reportaproblem.apple.com and follow the instructions. EU/UK consumers may have additional statutory rights (see EU/UK Consumer Rights).
We may, from time to time, release updates to the App or modify, suspend, or discontinue any feature of the Services. We may do so to add or remove functionality, fix bugs, comply with law, or for any other reason. Updates may be distributed through the App Store and may require you to update your device's operating system.
We will use reasonable efforts to maintain meaningful access to material content you have paid for, but we cannot guarantee perpetual availability of any specific feature.
The Services may link to third-party websites, applications, or resources, including the App Store and Apple's refund page. Those resources are independent of Lengio. We do not control them, do not endorse their content, and are not responsible for their availability, accuracy, or privacy practices. Your access to and use of any third-party resource is at your own risk and subject to the terms and policies of that resource.
The following terms apply because the App is distributed through Apple's App Store:
To the maximum extent permitted by applicable law, the Services are provided "as is" and "as available," with all faults, and Lengio, its affiliates, and its licensors expressly disclaim all warranties of any kind, whether express, implied, statutory, or otherwise, including any implied warranty of merchantability, fitness for a particular purpose, title, accuracy, quiet enjoyment, and non-infringement.
Without limiting the foregoing, we do not warrant that: (a) the Services will meet your requirements; (b) the Services will be uninterrupted, timely, secure, or error-free; (c) any content is complete, accurate, or current; or (d) any defect will be corrected.
You acknowledge that language learning depends on factors beyond our control (your time, effort, prior knowledge) and that we do not guarantee any particular learning outcome. Some jurisdictions do not allow the disclaimer of certain implied warranties; the disclaimers above apply only to the extent permitted by law.
To the maximum extent permitted by law:
The limitations in this section will apply even if any limited remedy fails of its essential purpose, and will survive termination of these Terms. Some jurisdictions do not allow the exclusion or limitation of liability for certain damages (e.g. for death, personal injury caused by negligence, fraud, or gross negligence); those limitations do not apply to you, but the other limitations remain enforceable.
To the extent permitted by applicable law, you agree to defend, indemnify, and hold harmless Lengio, its affiliates, and their officers, directors, employees, contractors, and agents from and against any and all claims, liabilities, damages, losses, and expenses (including reasonable attorneys' fees) arising out of or in any way connected with: (a) your access to or use of the Services; (b) your violation of these Terms; (c) your violation of any third-party right, including any intellectual-property or privacy right; or (d) any User Content you submit to us.
We reserve the right, at our own expense, to assume the exclusive defence and control of any matter for which you are required to indemnify us, in which case you agree to cooperate with our defence.
You may stop using the Services at any time by uninstalling the App. We may suspend or terminate your access to all or part of the Services at any time, with or without notice, if we reasonably believe that: (a) you have breached these Terms; (b) doing so is required by law or any competent authority; or (c) providing the Services to you is no longer commercially viable.
Termination will not affect any right, remedy, obligation, or liability that has accrued before termination. Sections that by their nature should survive termination (including IP, Disclaimers, Liability, Indemnification, Governing Law, Arbitration, and these survival provisions) will survive.
These Terms and any non-contractual obligations arising out of or in connection with them are governed by the laws of the jurisdiction in which Lengio is established, without regard to its conflict-of-laws rules. The United Nations Convention on Contracts for the International Sale of Goods does not apply.
Subject to the arbitration and dispute-resolution provisions below, the courts of that jurisdiction will have exclusive jurisdiction to settle any dispute arising out of or in connection with these Terms, except where mandatory consumer-protection law of your country of residence entitles you to bring proceedings in your local courts.
Before initiating any formal dispute, you and Lengio agree to first try in good faith to resolve the dispute by informal negotiation for at least 60 days. To begin, send a written description of the dispute, your contact details, and the relief you seek to support@lengio.app with the subject line "Dispute Notice". If we have a dispute with you we will send our notice to the email address on file with our support team. The 60-day period runs from receipt of the notice.
If you reside in the United States, you and Lengio agree that any dispute, claim, or controversy arising out of or relating to these Terms or the Services that has not been resolved through informal resolution under Section 20 will be resolved by final and binding individual arbitration administered by the American Arbitration Association (AAA) under its Consumer Arbitration Rules then in effect. The arbitration will be conducted in English, by a single arbitrator, and may be conducted by phone, video conference, written submissions, or in person at a location reasonably convenient to you.
The Federal Arbitration Act governs the interpretation and enforcement of this section. The arbitrator has exclusive authority to resolve any dispute about the formation, applicability, interpretation, or enforceability of this section, except that a court of competent jurisdiction has authority to decide enforceability of the class-action waiver.
For claims under USD 10,000, you may choose to have the arbitration conducted by telephone or based solely on written submissions. The arbitrator will have authority to grant any remedy that would otherwise be available in court, but only on an individual basis. Judgement on the award may be entered in any court of competent jurisdiction.
30-day opt-out. You may opt out of this arbitration agreement within 30 days of first accepting these Terms by sending written notice to support@lengio.app with the subject line "Arbitration Opt-Out" and including your name and an explicit statement that you wish to opt out. Opting out will not affect the rest of these Terms.
To the maximum extent permitted by law, you and Lengio each agree that any dispute will be brought only in an individual capacity, and not as a plaintiff or class member in any purported class, collective, consolidated, or representative proceeding. The arbitrator may not consolidate the claims of more than one person and may not preside over any form of representative or class proceeding. You and Lengio also waive any right to a jury trial on any claim. If a court decides that any part of this section is unenforceable, that part will be severed and the remainder will remain in force.
If you are a consumer resident in the European Economic Area, United Kingdom, or Switzerland, nothing in these Terms — including the disclaimers, liability cap, governing-law clause, or arbitration provisions — affects your mandatory statutory rights as a consumer, including any rights you have to: (a) bring proceedings in the courts of your country of residence; (b) the laws of your country of residence applying to non-derogable matters; or (c) any cooling-off, withdrawal, or guarantee rights.
EU online dispute resolution. The European Commission provides an online dispute-resolution platform at ec.europa.eu/consumers/odr. We are not obligated and do not commit to participate in alternative dispute resolution before a consumer-arbitration board, but you may use the ODR platform to submit a complaint.
We respect the intellectual-property rights of others. If you believe that material made available through the Services infringes your copyright, please send a notice under the Digital Millennium Copyright Act to support@lengio.app with the subject line "DMCA Notice". Include: (a) your physical or electronic signature; (b) identification of the copyrighted work claimed to be infringed; (c) identification of the allegedly infringing material with sufficient detail to locate it; (d) your contact information; (e) a statement that you have a good-faith belief that the disputed use is not authorised; and (f) a statement, under penalty of perjury, that the information in the notice is accurate and that you are the copyright owner or authorised to act on the owner's behalf.
We will respond to valid notices in accordance with applicable law and may remove or disable access to the material. Submitting a false notice may subject you to liability.
The Services may be subject to US, EU, UK, and other export-control and economic-sanctions laws. You agree not to export, re-export, or transfer the App or any related technology to any prohibited destination, person, or end use without obtaining required government authorisations. You represent that you are not located in, under the control of, or a national or resident of any country subject to comprehensive sanctions, and that you are not listed on any government list of prohibited or restricted parties.
If you access the Services on behalf of a US Government entity, the Services are "commercial computer software" and "commercial computer software documentation" as those terms are used in FAR 12.212 and DFARS 227.7202, and are licensed to the Government as commercial items, with only those rights granted to all other end users under these Terms.
We may revise these Terms from time to time. The "Last updated" date at the top of this page indicates when the latest version took effect. If we make material changes, we will provide reasonable advance notice — for example through the App, on this page, or by email to a known support contact — before the change becomes effective.
Your continued use of the Services after a revision becomes effective constitutes acceptance of the revised Terms. If you do not agree, you must stop using the Services. Changes will not apply retroactively to a dispute of which we have notice on the effective date.
Severability. If any provision of these Terms is held invalid, illegal, or unenforceable, the remaining provisions will continue in full force and effect, and the invalid provision will be modified to the minimum extent necessary to make it enforceable while best preserving the parties' intent.
No waiver. Our failure to enforce any provision is not a waiver of our right to do so later.
Assignment. You may not assign or transfer these Terms or your rights or obligations without our prior written consent. We may assign these Terms (in whole or in part) to an affiliate or to a successor in connection with a merger, acquisition, reorganisation, or sale of assets, on notice to you. Any prohibited assignment is void.
You consent to receive electronic communications from us and you agree that all agreements, notices, disclosures, and other communications we provide electronically satisfy any legal requirement that they be in writing. We may provide notices through the App, by posting on the Site, or to an email address you have provided to us. You may send notices to us at support@lengio.app.
We will not be liable for any failure or delay in performance caused by circumstances beyond our reasonable control, including acts of God, war, terrorism, riots, embargoes, acts of civil or military authority, fire, floods, earthquakes, accidents, network failures, strikes, pandemics, or governmental action.
Sections that by their nature should survive termination — including provisions relating to ownership, disclaimers, indemnities, liability limits, dispute resolution, arbitration, governing law, and these miscellaneous provisions — will survive.
These Terms, together with the Privacy Policy and any policies or terms expressly incorporated by reference, constitute the entire agreement between you and Lengio with respect to the Services and supersede all prior or contemporaneous agreements, communications, and proposals. To the extent that any portion of these Terms conflicts with Apple's App Store terms with respect to use of the App, Apple's terms control as to that conflict.
If you have questions about these Terms, want to send a notice, or need to exercise a right described above, please contact us:
Disclaimer. These Terms are provided in good faith and reflect our intent as of the effective date above. They are not legal advice. Where any translation conflicts with the English original, the English version controls.