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Terms of Service

Last updated: 26 October 2026

These terms govern your use of 100k: the 100k app, the website at 100kmethod.com and the subscription that gives you access to them (together, “100k”). By creating an account, starting a free trial or paying for a subscription, you agree to these terms. If you don’t agree, please don’t use 100k.

1. Who we are

100k is operated by Michał Mysiak, 46/10 Warszawska Street, 81-309 Gdynia, Poland (“we”, “us”). You can reach us at hello@100kmethod.com.

2. What 100k is — and what it isn’t

100k is a software app. It helps you track the energy you eat and burn, adds up your daily deficit towards a total of 100,000 kcal, and gives you notes from an automated in-app coach based on the data you enter.

3. Who can use 100k

You must be at least 18 years old. Please speak to a doctor before using 100k if you have a medical condition, take medication that affects your weight or appetite, are pregnant or breastfeeding, or have a history of disordered eating. 100k is not designed for you if any of these apply, and you should not use it without medical advice.

4. Your account

Keep your login details safe; you are responsible for activity on your account. Give us accurate information, especially about your body and activity, because the app’s numbers depend on it. One account is for one person.

5. Subscription, free trial and payments

6. The 100-day guarantee

If you do the work for 100 days and 100k doesn’t work for you, we refund every subscription payment you made for those 100 days.

You qualify if all of these are true:

  • At least 90 of your first 100 days (counted from the day you start using the app, including the free trial) are full days: the day is closed in the app and has at least one meal logged.
  • You weighed in through the app at least 5 times in each of weeks 1–14 (days 1–98; days 99–100 are not a separate week).
  • You send your request to hello@100kmethod.com within 14 days after day 100 (by day 114), from the e-mail address of your account. In it, tell us briefly why it didn’t work for you and confirm that you followed the plan.

How we check: we use the records in your account (closed days, meal entries, weigh-ins). We don’t ask for photos of you or medical documents.

What you get: a full refund of the subscription payments for the 100 days, sent to your original payment method through Lemon Squeezy, normally within 10 business days of approval. After a guarantee refund, your subscription is cancelled.

Limits: one guarantee per person. It doesn’t apply to accounts closed for breaking these terms, or where the records were created dishonestly (for example, entries made only to meet the conditions).

7. Your rights under the law

Nothing in these terms limits rights you have under consumer protection law that can’t be excluded, including, in South Africa, the Consumer Protection Act and the Electronic Communications and Transactions Act.

8. Using 100k fairly

Don’t misuse 100k: no attempts to break, overload or reverse-engineer it, no access to other people’s data, no automated scraping, no content that is illegal or abusive, and no reselling of access. We may limit, suspend or close an account that breaks these rules.

9. Your content

You keep ownership of what you put into 100k — meal photos, screenshots, entries and messages. You give us permission to store and process it only to run 100k for you, as described in our Privacy Policy. The 100k app, website, method materials and brand belong to us.

10. Availability and changes

We work to keep 100k running, but we can’t promise it will always be available or error-free. We may improve, change or remove features. If we stop offering 100k altogether, we’ll give you at least 30 days’ notice and refund any payment for time you can’t use.

11. Liability

To the extent the law allows: 100k is provided “as is”; we are not liable for indirect or consequential losses; and our total liability to you is limited to the amount you paid us in the 12 months before the claim. We don’t exclude liability that can’t be excluded by law, such as for gross negligence or wilful misconduct.

12. Ending your account

You can stop using 100k and ask us to delete your account at any time (Account → Delete my account, or write to hello@100kmethod.com). We may close accounts that break these terms. Sections that by their nature should survive (such as 9, 11 and 13) continue after your account ends.

13. Changes to these terms and governing law

We may update these terms. If a change matters, we’ll tell you in the app or by e-mail before it takes effect. These terms are governed by the laws of the Republic of South Africa, without limiting any mandatory consumer rights of the country you live in.

14. Contact

Michał Mysiak, 46/10 Warszawska Street, 81-309 Gdynia, Poland · hello@100kmethod.com