Delete Your JST Fitness Account

Last updated: 21 August 2026

This page explains how to permanently delete your JST Fitness account and the data that goes with it. It applies to the Android app and the web app at jst-fitness.vercel.app — they share one account.

Delete from inside the app (fastest)

1. Open JST Fitness and sign in.
2. Go to Profile → scroll to the bottom → Delete Account.
3. Type DELETE to confirm.

Deletion happens immediately. There is no grace period and no archive — a deleted account cannot be restored. If you want to keep your data, use Profile → Settings → Backup & Restore → Back Up Data first; the backup file stays on your device and belongs to you.

If you can't sign in

Email [email protected] from the email address on the account, with the subject line "Delete my account". We verify the request came from the account owner and process it within 30 days.

What gets deleted

• Your account and sign-in credentials.
• All synced data on our servers: weights, workouts, routines, custom exercises, measurements, meals, goals, achievements, streaks and profile details.
• Any feedback you sent with your email address attached, including that address.
• Crash diagnostics linked to the devices that feedback came from.
• The app's local copy of your data on the device you delete from.

What is not deleted, stated plainly

• Some feedback you sent without your email address — but less than this list used to claim. Every feedback message carries the device's diagnostic id even when your email doesn't, so if any other message from the same device did carry your email, the deletion sweep follows that link and removes the email-less ones too. What genuinely survives is narrower: a message from a device that never sent identified feedback, which we cannot connect to you. Email us a description if you want a specific one removed.
• Copies already on your other devices. We have no way to reach out to a phone or laptop and erase it. Once the account is gone those devices stop syncing, but whatever was already downloaded stays until you sign out, uninstall the app, or clear its data.
• Crash diagnostics that were never linked to your account. They carry no name and no email address, but they do carry the same per-device diagnostic id described above — so they are pseudonymous rather than anonymous, and we describe them that way. Reports age out and are deleted after 30 days regardless.
• A record that your email address has already had its free trial. Not the address itself — a one-way keyed hash of it that cannot be turned back into an email, holds no name and no fitness data, and answers only "has this address had a trial before?" It exists so that deleting an account and signing up again cannot be used to start the free trial over. It is deleted after 400 days.
• A food you chose to share. If you added a food to the food list and switched sharing on for it, the entry — the product's name, brand, serving, barcode and label figures — stays in every user's food list, because other people's logs may already use it and because sharing dedicated it to the public (Terms, section 9). What deletion removes is the private link between the entry and your account: afterwards nothing on our servers connects that food to you. It never carried your name, your email or anything from your log in the first place.

The full picture of what the app collects and why is in the Privacy Policy. Questions: [email protected].