Privacy policy
Last updated: 2 October 2026
Controller
Tobias WissmüllerGroschenweg 41g
81825 München
Germany
Email: hello+mokuso@ramuslabs.com
More details: Imprint
In short
Your diary stays yours. Mokuso has no server and no account, shows no ads and contains no analytics. Your entries live in a folder you choose, on your device or in your own iCloud Drive.
Your diary
Handwriting, transcripts and canvases are saved as open files in the folder you pick on first launch. If that folder is in iCloud Drive, Apple stores and syncs it under your iCloud account. We have no access. Handwriting is transcribed on your device with Apple’s Vision framework; nothing is sent anywhere for that.
Location
If you allow it, Mokuso uses your location while the app is open to put the name of your town in the page header. The location is resolved on the device, and only the town name is saved with the day. You can turn this off in Settings at any time.
Face ID
Face ID or Touch ID can lock the app. Your device does the check; Mokuso only learns whether it succeeded.
Subscription
The subscription is bought and billed through the App Store. We never see payment details.
Purchases are validated by RevenueCat, Inc. (USA). To check what you have bought, the app sends RevenueCat a randomly generated app user ID, technical device and app information (such as the operating system version) and the store transaction. RevenueCat creates the ID; it is not linked to your name, your store account or any other identity. The legal basis is the performance of the purchase contract and our legitimate interest in verifying purchases reliably (Art. 6(1)(b) and (f) GDPR). Data is transferred to the USA under the EU-US Data Privacy Framework and standard contractual clauses. See revenuecat.com/privacy.
Tracking
No ads, no analytics, no tracking, no advertising identifier.
App downloads
When you download or update the app, the App Store or Google Play processes data under their own privacy policies. We only receive aggregated, anonymous statistics such as download counts.
Contacting us
If you write to us, for example with “Contact support” in the app, we process your email address and message only to answer you (Art. 6(1)(b) and (f) GDPR). The app may pre-fill app version, platform and OS version; you can edit the mail before sending it.
Your rights
Under the GDPR you have the right of access (Art. 15), rectification (Art. 16), erasure (Art. 17), restriction of processing (Art. 18), data portability (Art. 20) and to object (Art. 21). You can withdraw any consent at any time with effect for the future (Art. 7(3)). Write to hello+mokuso@ramuslabs.com.
Most data never reaches us. It stays on your device or in your own iCloud account, and you can delete it yourself at any time by removing the app or its files.
Right to lodge a complaint
You can complain to a data protection supervisory authority, in particular in the member state where you live. The authority responsible for us is: Bayerisches Landesamt für Datenschutzaufsicht (BayLDA), Promenade 18, 91522 Ansbach.
Children
Our apps work without an account and do not ask for your age. We do not knowingly collect personal data from children under 16.
Changes
When the app or the law changes, we update this policy. The version published here applies.