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Drip vs Mori
The short answer: Drip and Mori both keep cycle records on the phone and ship without ads. Drip’s privacy policy says it does not collect personal information; Mori has no account unless you turn sync on. Drip is the open-source, non-commercial app (GPL-3.0-only on F-Droid) built around symptothermal fertility awareness, with import, export and a password. Mori is a closed-source Android app: free period logging, date-range estimates with a confidence label, structured export, and one optional paid feature — encrypted sync at US$3.99 once, which is not end-to-end or zero-knowledge.
Side by side
| Drip | Mori | |
|---|---|---|
| Price | Free. F-Droid describes it as non-commercial, with no ads and no sale of your data | All core features free forever; optional encrypted sync US$3.99 once |
| Account | None described. The privacy policy says drip does not collect personal information | None. An email is only needed if you opt into cloud sync |
| Where records live | On the device. The privacy policy says menstrual health data is stored only there | On the device by default. Sync, if you turn it on, uploads a client-encrypted snapshot |
| Source code | Open source, GPL-3.0-only (F-Droid). Repository: GitLab, bloodyhealth/drip | Not open source. An independent developer publishes a signed Android APK |
| Backup / migration | F-Droid lists import, export and password protection. No company cloud sync. Their privacy policy warns that the phone's own backup can still copy local data | Export as JSON, CSV or a readable summary, plus optional encrypted sync. Same kind of OS-backup caveat applies |
| Fertility / predictions | Sympto-thermal method: temperature plus cervical mucus, or temperature plus cervix. The FAQ says drip will not infer fertility from bleeding dates alone. It can notify you about the next period and temperature measurements | Deterministic estimates from your logged period dates, shown as ranges with a basis and a confidence label. Ovulation day and the fertile window are labelled estimates, not a contraceptive method |
| Extras named publicly | Bleeding, sex, mood, pain and other symptoms; cycle graphs; gender-inclusive design | Interactive calendar, cycle ring, discreet local reminders, one-tap delete-all, storage diagnostics. English and Simplified Chinese |
| Platforms | Android (Google Play, F-Droid, and an APK on dripapp.org) and iOS (App Store; their press page announced the iOS release for 30 August 2022) | Android today, as a signed APK from dl.moricycle.com — not on Google Play yet. iOS is in progress |
| Who makes it | F-Droid lists the Bloody Health collective. The privacy policy says the drip team, a project of Heart of Code e.V., Berlin | Jie Cao, an independent developer |
Where they genuinely differ
Code you can read vs a signed app you can delete
Drip's privacy claim is checkable in public source: F-Droid builds from that tree under GPL-3.0-only, and the privacy policy invites you to read the code. Mori does not publish source. Its claim is architectural and documented in the privacy policy: no account in the core flow, no analytics SDKs in the app, and records stay on the phone unless you enable sync. If auditing the implementation matters more than the written policy, Drip is the clearer choice.
Symptothermal charting vs labelled calendar estimates
These are different jobs. Drip's FAQ says fertile days come from the sympto-thermal method and that bleeding dates alone are not enough. That suits someone who already tracks waking temperature and a second fertility sign. Mori does not ask for temperature charts. It projects the next period and an estimated fertile window from period history, and it lowers the confidence label when the history is thin. Neither result is a clinical ovulation test, and neither is contraception advice.
No company cloud vs an optional encrypted copy
Drip does not offer a drip-operated backup. Moving phones means export, import, or re-entry, and their privacy policy tells you to check the phone's own cloud backup so it does not silently copy the local file. Mori keeps the same local default and adds two exits: a file export, or a one-time US$3.99 sync unlock. Sync encrypts the snapshot on the device before upload. Honest limit: the server stores the wrapped account key so password reset can work. That is encrypted at rest, not end-to-end encryption and not zero-knowledge. Details are in pricing.md and the privacy policy.
Which should you choose?
- Choose Drip if you want open-source code, symptothermal fertility awareness, a password on the data file, and iOS or F-Droid today — and you are fine with no company-run backup.
- Choose Mori if you want period logging with confidence-labelled date ranges, Simplified Chinese, structured export, and an optional encrypted backup, and you are on Android. It is a signed APK, not a Play or F-Droid install.
Honest note: Consumer Reports grouped Drip with Euki and Periodical as trackers that store data locally and skip third-party tracking. Mori was not in that review. On the facts above, Drip and Mori overlap on local storage and the lack of an account; they split on source availability, fertility method, languages and backup. See also Euki vs Mori and which period trackers keep data on your phone.
FAQ
Does Drip store period data on your phone?
Drip's privacy policy says it does not collect, retain or share usage data or personal information, and that menstrual health data is stored only on your device. It also warns that your phone's own cloud backup can still copy local app data. Mori stores records on the phone by default. Optional sync uploads a snapshot that was encrypted on the device; the server keeps that ciphertext and a wrapped recovery key, which is not end-to-end and not zero-knowledge.
Is Drip open source and free?
Yes. F-Droid lists drip under the GNU GPL v3.0 only, authored by the Bloody Health collective, and describes it as open-source and non-commercial with no ads. The privacy policy says the drip team maintains it as a project of Heart of Code e.V. in Berlin. Mori's core features are free forever; the only paid option is optional encrypted sync at US$3.99 once. Mori is not open source.
How do Drip and Mori estimate fertile days?
Drip's FAQ says fertile days use the sympto-thermal method (basal body temperature plus cervical mucus, or temperature plus cervix observations) and that it will not infer fertility from bleeding dates alone. Mori estimates the next period, cycle phases and an ovulation day or fertile window from your logged period dates, shows them as ranges with a confidence label, and states they are not a contraceptive method or a clinical result.
Sources
- drip official site · drip privacy policy (updated 30 August 2022) · drip FAQ · drip press note on the iOS release
- drip on F-Droid (GPL-3.0-only, Bloody Health collective) · GitLab source
- Consumer Reports — period tracker apps and privacy (recommends Drip, Euki and Periodical for local storage and no third-party tracking)
- Mori privacy policy · Mori pricing · Euki vs Mori