A habit log looks trivial — a column of checkmarks. Read it closely and it is a dated record of your health, sleep, drinking, medication, and every stretch where you fell apart. Worth knowing where it goes.
Related: No account · Offline habit tracking · No ads · Why we deleted our backend
Consider what people track. Medication and supplements. Alcohol, cigarettes, vapes — usually as things they are trying to stop. Sleep and wake times. Exercise, weight, calories, water. Therapy sessions, meditation, mood. Prayer. Journalling. Days sober.
Attach dates to that and you have something closer to a medical record than a to-do list. It shows chronic conditions through medication adherence, mental health through mood and therapy entries, addiction and recovery through the quit-habits, and your daily physical location pattern through when and where you log. A three-month gap in an exercise streak is a fairly legible signal that something went wrong in your life.
None of this is covered by health-privacy law in most places, because you typed it into a lifestyle app rather than telling a doctor. HIPAA and its equivalents generally do not reach a habit tracker on the App Store. Whatever protection exists is whatever that company's privacy policy promises, for as long as that company exists and that policy holds.
These work on any habit app, not just the ones compared here. The answers are usually in the privacy policy and the store listing's privacy label.
On your device, or on the company's servers? This is the question that determines every other answer. If the data never leaves your phone, most of the remaining risks simply do not apply.
“Encrypted” usually means encrypted in transit and at rest — with keys the company holds. That protects against outside attackers, not against the company, its staff, or a subpoena. “We cannot read it” is a much stronger claim than “it is encrypted.”
On a local-only app, deleting it deletes the data. On an account-based one, your history usually stays on the server until you find and use a separate deletion flow — if one exists.
Look for analytics SDKs, ad networks, and “trusted partners” in the privacy policy. Check the App Store privacy label for “Data Linked to You”. Any third party in that list is another party holding your habit history.
User data is an asset in an acquisition, and privacy policies are routinely rewritten by new owners. Data that only ever existed on your device is not on the inventory.
This is a genuine trade and it is worth stating both halves. Local-only is not strictly better — it is a different set of risks, and for habit data most people find it the better set.
Verified September 2026. Loop is open source under GPL-3.0, so its claims can be checked in the source rather than taken on trust — a genuine advantage over closed-source apps, ours included.
| App | Data location | Can the company read it? |
|---|---|---|
| Habiro | Your device Most private | ✗ No servers hold habit data |
| Loop Habit Tracker | Your device Auditable | ✗ No servers at all, and open source |
| Streaks | Your own iCloud | ✗ Apple's infrastructure, not the developer's |
| Finch | Finch's servers | ✓ Account-based storage |
| Habitica | Habitica's servers | ✓ Account-based, plus community data |
Habit data is stored on your device and is never sent to our servers. We do not operate a database of user habits, so we cannot read, recover, sell, or be compelled to produce your history. There is no account, so there is no email address on file and nothing linking your habit log to your identity.
The honest details. Backups exist in storage you already control: on iOS the app's data is included in your own iCloud backup, and on Android in Android's app backup to your Google account. Those are Apple's and Google's systems, not ours. We use Sentry for crash reporting, which sends technical details — device type, OS version, app version, the error — and never habit data. You can export everything to a JSON file from Settings at any time, and deleting the app removes the data from your device.
You are still trusting a privacy policy, because Habiro is closed source. If that is not good enough for you, Loop Habit Tracker is open source and you can read the code instead. We would rather say that than pretend the distinction does not exist. The full details are in our privacy policy.
Any tracker that stores data only on your device, because a server that never receives your habits cannot leak, sell, or be compelled to hand them over. Habiro and Loop Habit Tracker both work this way. Loop has the edge on verifiability since it is open source and the code can be audited; Habiro asks you to trust its privacy policy instead.
More than it looks. People track medication, alcohol, sleep, weight, therapy, mood, and days sober, all with dates attached. That combination reveals chronic conditions, mental health, and addiction recovery. In most places it falls outside health-privacy law precisely because you typed it into a lifestyle app rather than telling a clinician.
No habit data. There is no account, no email, and no server holding your habits. The app uses Sentry for crash reports, which carry technical details like device type, OS version, and the error itself — never your habits. Everything else stays on your device. See the privacy policy for the full list.
It is removed from your device along with the app. Because there is no server-side copy, there is no separate account-deletion request to file and nothing left behind for us to hold. If you want to keep the history, export it from Settings first — and note that your iCloud or Android backup may still contain a copy until it rotates out.
No, and the difference matters. Most apps mean encrypted in transit and at rest, with the keys held by the company — which protects you from outside attackers but not from the company, its employees, or a legal request. “We cannot read it” is a fundamentally stronger claim than “it is encrypted,” and only the first one is true when data never leaves your phone.
No account, no ads, and no servers holding your habit history. Free to start, $4.99 once for everything.
Download on App Store → Download on Google Play → Use on Web →Free to start with 3 habits, streaks, XP, and badges. $4.99 one-time unlocks everything forever. No ads, and your data is never sent to our servers.