Terms of Service and License Terms

Version: draft, 2026-11-09.

The terms of using TrailBuffer, the content of the Pro pass, the purchase, liability and complaints.

1. The service and the provider

TrailBuffer is a web app (PWA) that also works offline, for walkers and long-distance hikers. From the GPX route and the time limit you enter, it calculates during the walk how much spare time (buffer) you have against the limit, and suggests a target pace in km/h. The provider's details are in the Imprint.

TrailBuffer is not tied to any event: it does not supply or maintain official time limits, you enter them yourself. The only built-in route is one marked "Example".

[LAWYER – Ü3] The language of the contract (the language of the interface used, Hungarian or English), whether the contract is filed and how it can be accessed, and the steps of concluding the contract (purchase at Lemon Squeezy, activation in the app).

2. Safety notice: what TrailBuffer does not replace

Live tracking starts only after the safety notice is accepted; planning and simulation work without it. The acceptance is stored on the device with the version of the text and the time, and the app asks again when the text changes materially. Today's text:

TrailBuffer is an informational tool; it does not replace official race timekeeping, map-based navigation skills, or rescue preparedness. In an emergency, call 112!

TrailBuffer is not a medical device, not official timekeeping, not a navigation device and not an emergency service. What it shows is a factual observation and a speed target. When the situation is uncertain (for example lost GPS, stale data or an unknown state), the app does not show a reassuring buffer.

[LAWYER – Ü2] The final Hungarian and English text of the notice, the list of what it does not replace, and whether a click acceptance logged only on the device is sufficient.

3. Use without an account

TrailBuffer works without an account or sign-in. Your routes, settings and walks are stored only on your device; the provider has no access to them and cannot restore them. You can delete your data at any time with the "Delete all my data" button in the app. Details: Privacy Notice.

[LAWYER – Ü3] Whether a minimum age or parental consent is needed for purchase and use without an account.

4. Supported platforms and conditions of use

• Supported: Android Chrome, and iOS 18.4 or later as a web app installed on the home screen. There is no native app and no app store version.
• [OPEN – T86, MT-14] iOS support depends on the measurement on a real phone; if it fails, iOS is removed from the supported platforms until release.
• Tracking works reliably with the screen on (with a pocket lock and an external battery). In a web environment, tracking in the background with the screen off is not guaranteed; the self-check before Start warns you if keeping the screen awake fails.
• For offline use, the app and the map region you need must be loaded in advance, with an internet connection.

[LAWYER – Ü3] The supported platforms as part of the contract: how to state them, and what follows if a platform is removed.

[LAWYER – Ü6] Whether an accessibility statement or notice is required.

5. Free and Pro

The calculation on the free tier is never more optimistic than in Pro: whatever is known to reduce the buffer is free.

• Free: manual pace, time buffer, voice prompts, GPS tracking, night factor, manual terrain condition (dry, wet, muddy, deep mud). In Free, a label says that the pace is manual.
• Pro: on top of Free, adaptive pace learning, watch export and offline map regions.
• Offline map regions: Hungary and five mountain regions, downloaded to the phone. Offline: route, trails, water, names; detailed topo online only. A download needs a valid Pro license and an internet connection.

6. The Pro pass and prices

• Annual pass: €14.99, for 1 year from the purchase.
• 30-day pass: €4.99, for 30 days from the purchase.
• No automatic renewal. When the pass ends, the app switches to Free; if you want Pro again, you can buy a new pass.
• A walk started with Pro keeps Pro until it ends, even if the pass expires meanwhile (up to 72 hours after the expiry). The app warns you before the expiry.

[LAWYER – KT4] How the price must be shown: final gross price, currency, VAT content in the app and in the store (the accountant's side: K1).

[LAWYER – KT2] Who the contracting party is for the payment, and which part of the pass is the provider's service.

7. Purchase, activation and devices

• You buy on the Lemon Squeezy checkout page. Lemon Squeezy is the reseller (Merchant of Record): it calculates and pays the VAT and issues the invoice. Your card details never reach the provider.
• [OPEN – T89] The store and the two products are not live yet; where the purchase link appears (app, website) is part of the web step of T87.
• After the purchase you receive a license key by email. Entered in the app, the key activates Pro on this device; for this, the app sends the key and a random identifier generated on the device to the provider's server, which checks the key with Lemon Squeezy. After that, Pro also works without internet; the app renews the entitlement from time to time when online.
• [OPEN – T88] Each license can be used on 3 devices, listed in the app, and any of them can be released by the user. Today the activation limit comes from the store's product setting, and only support can release a device.
• "Delete all my data" also deletes the license key from the device; entering it again counts as a new activation.
• The license is not transferable. [LAWYER – Ü3] The scope of the license and the wording of the transfer restriction.

8. Refunds and withdrawal

Within 14 days of the purchase you can ask for the price back without giving a reason, for both passes. Details: Refund and Withdrawal Notice.

[LAWYER – KT3] How the voluntary refund relates to the statutory right of withdrawal, and the mandatory withdrawal information.

9. Conformity and updates

TrailBuffer is a web app: updates are downloaded the next time you open it with an internet connection. If you find a fault, write to [DATA – support address, T92].

[LAWYER – Ü3] The mandatory information on the conformity of the digital service and on updates (Directive (EU) 2019/770 and its Hungarian implementation), and what happens if the service ends.

10. Liability

The calculation is based on the route and time limit you enter, the GPS data and general walking models. The real walking time can differ because of the terrain, the weather, the GPS accuracy, the device and your own condition. You are responsible for your decisions, in particular whether to continue or to stop.

[LAWYER – Ü1] The permitted content of a limitation of liability for a sole proprietor, in view of the Product Liability Directive ((EU) 2024/2853) and Section 6:152 of the Hungarian Civil Code, and whether the timing of the first sale relative to 9 December 2026 matters. This draft deliberately contains no limitation of liability.

[LAWYER – KT1] How the legal form and liability insurance affect this section.

11. Map data and intellectual property

The maps are based on OpenStreetMap data (© OpenStreetMap contributors, ODbL). The sources and attribution of the map layers: Local Storage, Third Parties and Map Attribution.

[LAWYER – Ü5] The licensing of the downloadable region package (ODbL, OpenMapTiles CC-BY 4.0), the terms of the online layers, and the outcome of the trademark check of the name "TrailBuffer".

12. Complaints and remedies

You can file a complaint at [DATA – support address, T92].

[LAWYER – Ü3] The complaint procedure (response deadline, record and retention), and naming the competent conciliation board, the consumer protection authority and the courts.

13. Changes to these terms and governing law

Without an account the provider cannot notify you by email; changes to these terms are shown in the app and on the website.

[LAWYER – Ü3] How changes are communicated and accepted without an account (today only the acceptance of the safety notice exists in the app), and the governing law.