Drafting an end-user licence agreement (EULA) for your startup’s mobile app

If your startup offers a downloadable mobile app or desktop software that users install on their own devices, you will probably need an end-user licence agreement (EULA). A EULA is the legal contract between your company and the person who downloads or uses your software. It sets out what they can and cannot do with your product, and it protects your intellectual property.

While your terms of service might cover your website or SaaS platform, a EULA is specifically designed for software that runs locally. It is particularly important when you distribute apps through stores like Apple’s App Store or Google Play, where the platform’s own rules still leave room for, and often expect, your own licence terms.

This post walks you through the core sections you should consider including. It is not legal advice. You should always have a solicitor review any contract you plan to rely on.

What a EULA does

A EULA grants a limited right to use your software. It does not transfer ownership. Without a clear EULA, your startup could face disputes over the scope of the licence, what users are allowed to do with your code, and who bears responsibility if something goes wrong.

For a small startup without in-house counsel, a well-drafted EULA reduces support headaches, limits your exposure to liability, and gives you a contractual basis to terminate access for users who misuse your app.

Key clauses to include

While every product is different, most startup EULAs benefit from covering the following areas.

Grant of licence

This clause defines the permission you give the user. In plain English, spell out that you grant a non-exclusive, non-transferable, revocable licence to install and use the software for personal or internal business purposes, as applicable. Be clear about how many devices they can install it on and whether the licence is time-limited or perpetual. If your app has a free tier with limited features, make the scope explicit here.

Restrictions on use

This is where you protect your code and business model. You should forbid activities like reverse engineering, decompiling, creating derivative works, renting, leasing or sublicensing the software. If your app relies on a central server or API, you may also want to restrict automated access or scraping. The tone can be firm but should still be understandable. For example:

“You may not disassemble, decompile or reverse engineer the software except where this restriction is expressly prohibited by applicable law.”

Intellectual property ownership

Make it clear that you retain all rights, title and interest in the software, including any updates, modifications and related documentation. This clause reassures investors that your core IP is properly protected. If your app contains open-source components, you may need to reference the applicable licences in a separate section or schedule. Do not rely on implication; state ownership explicitly.

User-generated content

If your app lets users create, store or share content, address ownership and the licence they grant you. Typically, you want users to retain ownership of their content while giving your startup a worldwide, royalty-free licence to host, display and distribute it solely to provide the service. Avoid overly broad language that could raise privacy concerns or breach your own privacy notice.

Disclaimers and limitation of liability

Startups often ship apps on tight timelines. A clear disclaimer of warranties can reduce the risk of claims related to bugs, performance issues or compatibility problems. For example:

“The software is provided ‘as is’ without warranty of any kind, express or implied, including but not limited to warranties of merchantability or fitness for a particular purpose.”

The limitation of liability clause caps your financial exposure. In UK business-to-consumer contracts, you cannot exclude liability for death or personal injury caused by negligence, and any limitation must be reasonable. For B2B apps, you have more flexibility but should still set a realistic cap, such as the fees the user paid in the last 12 months. A solicitor can help you strike the right balance.

Termination

Explain the circumstances under which the licence ends. This could be when a user breaches the agreement, deletes their account or stops paying a subscription. You need the right to terminate access remotely if your app includes an account-based system. Also state what happens to user data upon termination, consistent with your privacy notice and data retention policy.

Governing law and jurisdiction

Pick a governing law. For a UK startup, English law is the natural choice. You should also specify the courts that will handle disputes. If most users are in the UK, English court jurisdiction keeps things straightforward.

Changes to the agreement

Your app will evolve, and so might your terms. Include a mechanism for updating the EULA. For mobile apps, consider whether you can simply require acceptance of updated terms at next login, or if you need to notify users via email or in-app messaging. Check platform guidelines; some app stores have specific rules about when you must prompt users to re-accept terms.

Practical tips for startups

• Keep the language as plain as possible. Your EULA does not need to sound like a 1990s shrink-wrap licence. Short sentences and clear headings make it more enforceable and less likely to be ignored.
• Align your EULA with your privacy notice. If you mention data collection, do not contradict what users have already been told. Inconsistency can cause GDPR compliance headaches.
• Include version control in your document. Note the effective date and track changes. StartupDocs templates can help you maintain a clean history.
• Store signed EULAs as part of your customer records. For mobile apps, acceptance is often a click-through during installation. Retain evidence of that acceptance for as long as the user remains active.
• Review your EULA whenever your product features or business model change. A subscription launch, introduction of in-app purchases or addition of third-party integrations might require updated restrictions or data terms.

When to ask a solicitor

If your app handles sensitive data, operates in regulated sectors like health or finance, or generates significant revenue per user, get tailored advice. Also involve a solicitor if you plan to license the software to large enterprise customers who will demand their own amendments. The investment pays for itself by avoiding disputes later.

A solid EULA lets you distribute your app with confidence. It sets the rules of the road, protects what you have built and gives your startup a professional foundation as you grow. For a ready-made starting point, explore the template packs in StartupDocs, which you can customise without starting from scratch.