Terms of use

Last updated: October 30, 2026

The short version

1. Agreeing to these terms

ThoughtCheck is run by Lunar Web Studio, LLC, doing business as ThoughtCheck. In these terms, "we", "us" and "our" mean Lunar Web Studio, LLC. "You" means the person using ThoughtCheck. "ThoughtCheck" means the website at thoughtcheck.app, the web app, and any ThoughtCheck apps, printables and services.

By using ThoughtCheck, you agree to these terms and to our privacy policy. If you don't agree, please don't use ThoughtCheck.

If you got the ThoughtCheck app from Apple's App Store, Apple's standard app license (the Licensed Application End User License Agreement) also applies to that app.

2. Who can use ThoughtCheck

You must be 18 or older to use ThoughtCheck. The app asks you to tap I'm 18 or older before you start.

3. ThoughtCheck is not medical care

ThoughtCheck helps you notice a thought, look at the evidence, and write a fairer thought. It uses ideas from cognitive behavioral therapy (CBT).

In a crisis: if you are thinking about hurting yourself or someone else, or you are in danger, call or text 988 in the US or Canada (the Suicide and Crisis Lifeline in the US, or the Suicide Crisis Helpline in Canada), call 911, or contact your local emergency number. In other countries, Need help now? in the app shows help lines for the country you pick in Settings. The app has help lines for the UK (including Northern Ireland), Ireland, Australia, New Zealand, South Africa, India, Singapore and the Philippines. The app first guesses your country from your device's time zone, so check that it shows the right one. If yours isn't listed, pick Somewhere else, call your local emergency number, or find a help line at findahelpline.com. Help line services can change their numbers or hours. If a number doesn't work, call your local emergency number. Don't rely on ThoughtCheck in an emergency. When you type words about suicide or self-harm, ThoughtCheck tries to show crisis help lines, but it won't notice every time.

If a therapist or counselor suggested ThoughtCheck to you, they are responsible for their own care. We don't provide care through them, and they can't see your checks through us.

4. What you write is yours

You own what you write in ThoughtCheck. It is saved only on your device. In the iPhone and Android apps, your phone's own backup (iCloud or Google) may also keep a copy, as our privacy policy explains. We don't keep a copy. You don't give us any rights to what you write.

Because it is only on your device, you are responsible for it. If you clear your browser data, lose your device, or delete the app, your checks may be gone and we can't recover them. Your browser may also delete them on its own, for example on iPhone and iPad if you don't open ThoughtCheck for about a week.

5. Using ThoughtCheck fairly

Please don't:

We may block anyone who does these things.

6. Our content

ThoughtCheck's design, text, code, logo and name belong to Lunar Web Studio, LLC and are protected by copyright and trademark law. You may use ThoughtCheck for your own personal use.

Printables for clinicians. Therapists, counselors and other professionals may print the free materials on our clinicians page and give them to clients at no charge. Please don't change them or sell them.

Bible verses. The Bible verse option uses the World English Bible, which is in the public domain. The short notes with each verse are ours.

Every check is free, always. ThoughtCheck Plus is a paid extra. It adds charts of thinking patterns, feelings and check-ins over weeks and months, search and export of your full history, a summary of the last 7, 14 or 30 days to bring to therapy, showing a check or a summary as a QR code, color themes, and a regular check-in reminder and more reminder options. My cards, the check-in, your patterns from the last 7 days, backup files, checking a thought ahead of time with a reminder, and sharing one saved check are free.

You can buy ThoughtCheck Plus in the iPhone and Android apps, through Apple's App Store or Google Play, or get it with a Plus code from a therapist or clinic (section 8). The app shows the price before you buy.

If you buy through an app store, that store's terms also apply.

8. Plus codes for clinics

Therapists, counselors, clinics and other organizations can buy codes on our codes page (thoughtcheck.app/clinicians/codes) to give to their clients. If you buy codes for a practice or organization, you agree to these terms for it, and you confirm that you're allowed to do that.

We don't tell a clinic or therapist who redeemed a code or what anyone wrote, and they can't see a client's checks through us. Please don't send us client names or details about anyone's health. Our privacy policy explains what we keep when you buy codes.

9. The AI helper

ThoughtCheck doesn't offer an AI helper now. If we add one, we will update these terms before it opens.

10. Changes to ThoughtCheck

We may change, add or remove features, or stop offering ThoughtCheck. Because your checks are saved on your device, the web app you already have will usually keep working offline. If we stop offering a paid feature you paid for, we'll tell you what happens next.

ThoughtCheck links to other websites, such as crisis help lines. We don't control them and aren't responsible for them. If you turn on Bible verses, it also links to Meinate. Meinate is from the makers of ThoughtCheck, but it's a separate website and app with its own terms, and these terms don't cover it.

12. No promises about results

We work hard to make ThoughtCheck helpful and reliable. But ThoughtCheck is provided "as is" and "as available". To the extent the law allows, we make no promises that it will meet your needs, work without errors or interruptions, or lead to any particular result.

13. Limits on our responsibility

To the extent the law allows:

Some places don't allow these limits, so they may not apply to you. Nothing in these terms limits rights you have that the law says can't be limited.

14. If you misuse ThoughtCheck

If someone makes a claim against us because you broke these terms or the law while using ThoughtCheck, you agree to cover our reasonable costs from that claim, to the extent the law allows.

15. Disagreements

If you have a problem with ThoughtCheck, please email us first. Most problems can be fixed that way.

These terms are governed by the laws of the State of Texas and by United States law, without regard to conflict of law rules. Any legal dispute will be handled in the state or federal courts located in Texas, unless the law where you live gives you the right to bring it somewhere else.

16. Changes to these terms

If we change these terms, we'll update the date at the top. If a change is important, we'll tell you on the website or in the app before it takes effect. If you keep using ThoughtCheck after a change takes effect, you agree to the new terms.

If any part of these terms can't be enforced, the rest still applies.

17. Contact

Lunar Web Studio, LLC, dba ThoughtCheck
Email: hello@thoughtcheck.app