Effective date: June 30, 2026 · Last updated: June 30, 2026
This Privacy Policy explains how Rivership (a sole proprietorship based in Tokyo, Japan, operated by Ryo Kawafune — “we”, “us”) handles information in connection with the iOS applications we publish on the App Store (each, an “App”). It applies to all of our Apps unless an App provides its own separate policy.
Our Apps are designed to be on-device first. We do not require you to create an account, and the content you produce in most Apps (such as habits, notes, study progress, logs, and timers) is stored locally on your device and, if you enable it, in your own private iCloud. We do not operate servers that collect or hold that personal content.
We do not sell your personal information. The limited processing that does occur is described below and is tied to specific features.
| Feature | What is processed | Who processes it |
|---|---|---|
| App content (habits, notes, logs, study progress, etc.) | Stored locally on device / your iCloud. Not transmitted to us. | You / Apple iCloud |
| Purchases & subscriptions | Purchase and entitlement events, and an anonymous app-user identifier, used to unlock paid features and restore purchases. We never receive your name or payment card details. | Apple; RevenueCat, Inc. |
| Advertising (ad-supported Apps only) | Some Apps show ads. The ad provider may collect device identifiers, coarse usage and interaction data to deliver and measure ads. These Apps offer a paid option to remove ads. | Google AdMob |
| AI writing feedback (IELTS Writing Coach only) | The practice text you choose to submit for evaluation is sent to our grading endpoint and a third-party AI provider to generate feedback. It is used only to produce your result and is not used to train models. | Anthropic (Claude API) |
| Diagnostics | If you opt in via iOS settings, Apple shares aggregated crash and usage analytics with us. This is not linked to your identity. | Apple |
On-device content remains until you delete it or remove the App. Purchase records are retained by Apple and RevenueCat as needed to provide and restore your entitlements. Text submitted for AI feedback is processed transiently to return your result and is not retained by us for any other purpose.
Our Apps are not directed to children under 13, and we do not knowingly collect personal information from children. If you believe a child has provided us information, contact us and we will address it.
We are based in Japan. Third-party providers listed above may process data in other countries under their own safeguards and policies.
We may update this policy as our Apps evolve. Material changes will be reflected here with a new “Last updated” date.
Rivership — Ryo Kawafune, Tokyo, Japan
info@rivership.org