ArcHabit & goal tracker · com.syntay.arc

Terms & Conditions

Last updated: 12 August 2026

These terms are the agreement between you and Arc for using the app. We've kept them plain. By creating an account or using Arc, you agree to them. If you don't agree, please don't use the app.

The short version

Use Arc for your own habit tracking; don't abuse, resell, or break it.
Your habit data is yours. You can export or delete it any time.
Arc Plus is an optional paid subscription billed through Google Play; you can cancel any time.
Arc is a self-tracking tool, not medical, health, or professional advice.
The app is provided "as is", and our liability is limited as set out below.

1. Who we are

Arc ("the app", "we", "us") is a habit and goal tracker for Android, published under the package com.syntay.arc. These Terms apply to the Arc app and its companion surfaces (home-screen and lock-screen widgets, the Quick Settings tile, and the Wear OS app).

2. Eligibility

Arc is intended for a general audience and is not directed at children under 13. You must be at least 13 years old (or the minimum age of digital consent in your country) to use Arc, whether or not you create an account. By using Arc, you confirm that you meet this requirement.

3. Your account

An account is optional. You can use Arc's core habit tracking without ever signing up — an account is only needed if you want cloud sync, Arc Plus, or the accountability-partner feature. If you do create an account:

You're responsible for the information you provide and for keeping your sign-in credentials secure.
Keep your account details accurate. You're responsible for activity that happens under your account.
Tell us promptly if you believe your account has been accessed without your permission.

4. Acceptable use

To keep Arc working for everyone, you agree not to:

break the law, infringe others' rights, or upload content you don't have the right to use;
attempt to disrupt, overload, reverse-engineer, decompile, or gain unauthorised access to the app or its systems;
misuse the accountability-partner feature to harass, abuse, or send unwanted content to others;
resell, sublicense, or commercially exploit the app except as expressly allowed.

5. Your content

The habits, goals, moods, notes, and identities you create are your content, and you own it. You grant us only the limited permission needed to operate the app for you — for example, to store your data and, if you turn on Cloud sync, to back it up to your account so you can restore it and use it across devices. We don't claim ownership of your content and we don't sell it. You can export everything (JSON/CSV) or delete your account and data at any time from inside the app.

6. Arc Plus subscriptions & payments

Some features are part of Arc Plus, an optional paid plan. Arc Plus is offered as a monthly or yearly auto-renewing subscription, and may be offered as a one-time lifetime purchase.
A free trial may be offered (e.g. 30 days). If you don't cancel before the trial ends, it converts to a paid subscription at the price shown at sign-up.
Purchases are processed by Google Play Billing — we never see your card or payment details. Subscriptions renew automatically until cancelled.
You can manage or cancel a subscription any time in your Google Play account; cancellation takes effect at the end of the current billing period.
Refunds are handled under Google Play's policies and any rights you have under applicable law.
Prices and the features included in a plan may change; we'll give notice of material changes, and changes won't apply retroactively to a billing period you've already paid for.

7. Intellectual property

The Arc app itself — its software, design, branding, and content we provide — belongs to us or our licensors and is protected by intellectual-property laws. We grant you a personal, non-exclusive, non-transferable, revocable licence to use Arc for your own habit tracking, subject to these Terms. The Arc name and logo may not be used without our permission.

8. Privacy

Your use of Arc is also governed by our Privacy Policy, which explains what we collect, why, and the controls you have. Arc is built on-device first: your data stays on your phone unless you turn on a feature that needs the cloud.

9. Not professional advice

Arc is a self-tracking and motivation tool. Its insights, predictions, slip-risk estimates, and correlations are for general informational purposes only and are not medical, mental-health, or other professional advice, and not a substitute for it. Always seek the advice of a qualified professional for decisions about your health or wellbeing. Never disregard professional advice because of something in the app.

10. Service availability & changes

We work to keep Arc available and reliable, but we may update, change, suspend, or discontinue features from time to time. Some features depend on third-party services (such as Google Firebase, Google Play, and Health Connect) that are outside our control.

11. Disclaimers

Arc is provided "as is" and "as available", without warranties of any kind, whether express or implied, to the fullest extent permitted by law. We don't warrant that the app will be uninterrupted, error-free, or that data predictions will be accurate. Some jurisdictions don't allow certain disclaimers, so some of the above may not apply to you.

12. Limitation of liability

To the fullest extent permitted by law, Arc and its suppliers will not be liable for any indirect, incidental, special, consequential, or punitive damages, or for any loss of data, profits, or goodwill, arising from your use of (or inability to use) the app. Nothing in these Terms limits liability that cannot be limited under applicable law, including your statutory consumer rights.

13. Termination

You may stop using Arc and delete your account at any time from inside the app. We may suspend or terminate access if you materially breach these Terms or use the app in a way that harms other users or our systems. On termination, the licence granted to you ends; sections that by their nature should survive (such as content ownership, disclaimers, and limitation of liability) will remain in effect.

14. Changes to these Terms

We may update these Terms as the app evolves. We'll revise the "Last updated" date above and, for material changes, surface a notice in the app. Continuing to use Arc after changes take effect means you accept the updated Terms.

15. Governing law

These Terms are governed by the laws applicable where the developer is established, without regard to conflict-of-laws rules, and subject to any mandatory consumer-protection rights available to you in your country of residence.

16. Contact

Questions about these Terms? Email contact@syntay.com.