Terms
Last updated: 21 August 2026
These Terms of Use (“Terms”) are a legal agreement between you and Little Polar Apps Ltd (“Day 100”, “we”, “us”), a company registered in England & Wales, governing your use of the Day 100 mobile app and related websites at day100.co and day1.at (the “Service”). By creating an account or using the Service, you agree to these Terms. If you do not agree, do not use the Service.
The Service
Day 100 helps you pick a daily fitness challenge and track it over 100 days. The Service is provided for your personal, non-commercial use. We may add, change, or remove features at any time.
Your account
You need an account to use most of the Service. You are responsible for keeping your login secure and for activity under your account. You must provide accurate information and be old enough to form a binding contract in your country (and at least 13). You can delete your account and associated data at any time from Settings → Account → Delete account.
Day 100 Pro subscriptions
Day 100 Pro is an auto-renewing subscription offered on a monthly or yearly basis. The subscription title, length, and price are shown in the app before you purchase and on your app store’s product page.
- Billing. Payment is charged to your Apple ID (or Google Play account) at confirmation of purchase.
- Auto-renewal. Your subscription renews automatically for the same period and price unless you cancel at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the period ends.
- Managing and cancelling. You can manage or cancel your subscription in your app store account settings (Apple ID → Subscriptions, or Google Play → Subscriptions). Deleting the app does not cancel a subscription.
- Free features. The core of Day 100 — one active challenge, the 100-day grid, daily check-ins, streaks and sharing — is free to use.
- Refunds. Purchases are handled by Apple or Google; refund requests are subject to their policies.
Acceptable use
You agree not to misuse the Service: no unlawful, harmful, or abusive activity; no attempting to break, overload, reverse-engineer, or gain unauthorised access to the Service; and no using it to harass others or infringe their rights. Fitness challenges are undertaken at your own risk — see “Health disclaimer” below.
Sharing and other users
If you share a challenge or follow someone else’s, certain progress information (such as a challenge’s grid and streak, and your display name) may be visible to others as described in the app and our Privacy Policy. Do not share links with anyone you don’t want to see that information. You are responsible for the content you choose to share.
Health disclaimer
Day 100 is not a medical service and does not provide medical advice. Consult a qualified professional before starting any exercise programme. You are solely responsible for exercising safely and within your own limits.
Intellectual property
The Service, including its software, design, and content we provide, is owned by Little Polar Apps Ltd and protected by law. We grant you a personal, non-transferable, non-exclusive, revocable licence to use the app as intended. You retain rights to the content you create.
Disclaimers and limitation of liability
The Service is provided “as is” and “as available” without warranties of any kind. To the fullest extent permitted by law, we are not liable for indirect, incidental, or consequential damages, or for any loss arising from your use of, or inability to use, the Service. Nothing in these Terms limits liability that cannot be limited by law.
Termination
You may stop using the Service and delete your account at any time. We may suspend or terminate access if you breach these Terms or misuse the Service.
Changes to these Terms
We may update these Terms from time to time. When we do, we will revise the “Last updated” date above and, where appropriate, notify you in the app. Continued use after changes take effect means you accept the updated Terms.
Governing law
These Terms are governed by the laws of England & Wales, and disputes are subject to the exclusive jurisdiction of its courts, except where mandatory local consumer law provides otherwise.
Contact
Questions about these Terms? Email [email protected].
Little Polar Apps Ltd, Ipswich, United Kingdom.