Terms & Conditions

Last updated: 6 September 2026 · Version 1.0
Please read this first. ternii is a free, general-purpose AI assistant that runs on your phone. It can be wrong, incomplete or out of date. Nothing it produces is medical, legal, financial, safety-critical or other professional advice — check anything that matters with a qualified person. You are responsible for how you use what it tells you.

These terms are an agreement between you and Middletech Limited, a company registered in England and Wales (company number 16955822) with its registered office at 55 Colmore Row, Birmingham, England, B3 2AA ("Middletech", "we", "us") for the ternii mobile application (the "app") and the ternii.com website (the "site"). By installing or using the app or the site you accept these terms. If you do not accept them, please do not use ternii. Our privacy notice explains what the app does with information and forms part of these terms.

1. Who can use ternii

You must be at least 13 years old. If you are under 18, you confirm that a parent or guardian has agreed to these terms on your behalf. You must be legally able to enter into this agreement in your country.

2. Your licence to use the app

We grant you a free, personal, non-exclusive, non-transferable, revocable licence to install and use ternii on devices you own or control, for your own personal or internal business use, in accordance with these terms and the rules of the app store you obtained it from. You may not sell, rent, sublicense or redistribute the app; modify or make derivative works of it; or reverse-engineer, decompile or disassemble it, except to the extent that applicable law expressly allows despite this restriction. Open-source components included in the app remain under their own licences (section 9).

3. What the assistant is — and is not

4. Acceptable use

You agree not to use ternii to create, obtain or facilitate anything that is unlawful, harmful, abusive, deceptive or exploitative; that harasses or threatens anyone; that promotes violence, self-harm or terrorism; that sexualises or endangers children; that infringes anyone's rights; or to generate malware or attack any system. You agree not to attempt to circumvent the app's safety features, to interfere with our content host or the third-party services the app can reach, or to use the app in a way that breaks the terms of those services. The app's safety filters may refuse requests; this is deliberate.

5. Your content

Everything you create or add in ternii — conversations, notes, files, settings — stays on your device. We do not receive it and claim no rights in it. You are responsible for it, including for having the right to use any content you attach. If you send us feedback, suggestions or an expert-pack request, you grant us a perpetual, royalty-free licence to use it to improve ternii, without any obligation to you.

6. Models, expert packs and downloads

ternii downloads AI models and expert packs to your device from our content host, only when you choose to. Downloads can be large (up to about a gigabyte) — we recommend Wi-Fi — and use your device's storage. Every download is verified against a checksum before it is used. The "ternii Brain" model is Middletech's own work and is licensed to you for use within the app only. Optional open models are provided under their own open-source licences, which are identified in the app (for example Microsoft's BitNet b1.58, MIT licence). We may add, change, replace or withdraw models, packs, tools and features at any time.

7. Third-party services and your own accounts

Some optional features contact third-party services directly from your phone (for example Wikipedia, Open-Meteo, the BBC, Yahoo Finance, your own email server, or an AI server you configure). Your use of those services is subject to their terms and privacy policies, not ours; we do not control them and are not responsible for their availability, accuracy or conduct. Where a feature needs your own credentials (an email app-password, an API key for a server you run), you are responsible for keeping them secure and for any charges the provider makes. If you configure an external AI server, you understand that your prompts are sent to it.

8. App stores

If you obtained ternii from Apple's App Store or Google Play, the store's own terms also apply, and where they conflict with these terms the store's terms prevail for that store's purposes. For the App Store in particular: this agreement is between you and Middletech, not Apple; Apple has no obligation to provide maintenance or support for the app; Apple is not responsible for any product-liability, legal-compliance or intellectual-property claims relating to the app, which are our responsibility to the extent permitted by law; in the event the app fails to conform to any applicable warranty you may notify Apple, which may refund the purchase price (none, for a free app), and Apple has no other warranty obligation; and Apple and its subsidiaries are third-party beneficiaries of these terms and may enforce them against you. You confirm you are not in a country subject to a US Government embargo or designated as "terrorist supporting", and are not on any US Government list of prohibited or restricted parties.

9. Open-source software and intellectual property

ternii, its name, the tern mark, the ternii Brain model and all software, design and content in the app and on the site are owned by Middletech or its licensors and protected by intellectual-property law. The app includes open-source components — including the llama.cpp / ggml inference runtime, QuickJS, Google ML Kit, and Android Jetpack libraries — used under their respective licences, which are listed in the app's About section. Nothing in these terms transfers any intellectual-property right to you other than the licence in section 2.

10. Availability, changes and ending the agreement

ternii is provided free of charge and is under active development. We do not promise that the app, its downloads or the site will be uninterrupted, error-free or available in every country, and we may change, suspend or discontinue any part of them, or these terms, at any time. If we change these terms materially we will update the date and version at the top and, where practical, tell you in the app. Continuing to use ternii after a change means you accept it. You can end this agreement at any time by deleting the app. We may end it if you breach these terms.

11. No warranty

To the fullest extent permitted by law, ternii is provided "as is" and "as available", without warranties of any kind, express or implied, including any warranty of accuracy, fitness for a particular purpose, merchantability or non-infringement. This does not affect any rights you have as a consumer that cannot be excluded by law, including your rights under the Consumer Rights Act 2015 in respect of digital content.

12. Limitation of liability

Nothing in these terms limits or excludes our liability for death or personal injury caused by our negligence, for fraud or fraudulent misrepresentation, or for anything else that cannot lawfully be limited or excluded. Subject to that, to the fullest extent permitted by law, we will not be liable for any loss or damage arising from your use of, or inability to use, ternii — including any reliance on its output — whether in contract, tort (including negligence) or otherwise, and in particular for any indirect or consequential loss, loss of data, loss of profit, business or goodwill. Because the app is provided free of charge, our total liability to you for all claims relating to it is limited to £100. If you are a consumer, nothing here affects your statutory rights.

13. Governing law and disputes

These terms are governed by the law of England and Wales, and the courts of England and Wales have jurisdiction over any dispute — except that if you are a consumer living elsewhere in the United Kingdom or in the European Union, you also benefit from any mandatory protections of the law of the place where you live and may bring proceedings there. If any part of these terms is found unenforceable, the rest continues to apply. These terms are the whole agreement between you and us about ternii.

14. Contact

Middletech Limited, a company registered in England and Wales (company number 16955822) with its registered office at 55 Colmore Row, Birmingham, England, B3 2AA.
Email: [email protected].