Deep Revision: PSLE Science ("Deep Revision," "the app," "we," "us") is a revision app for Singapore's PSLE Science syllabus. This policy explains what information the app handles, how it's stored, and what — if anything — leaves your device. We've written it to describe exactly what the app does, not a generic template.
To power your revision plan, missions, and progress tracking, the app stores the following directly on your phone using your device's local storage. None of it is transmitted to us, because we don't operate a backend server that the app talks to.
You can clear all of this at any time using Reset Progress in the app's Profile tab, or simply by deleting the app — both permanently erase this data, since it exists only on your device.
Deep Revision offers a single one-time purchase to unlock premium features. This transaction is handled entirely by Apple's App Store or Google Play's billing system — we never see or store your payment details (card numbers, billing address, etc.). Apple and Google may retain purchase records under their own privacy policies, linked to your Apple ID or Google account, independent of this app.
The app does not include:
| Capability | Present in this app? |
|---|---|
| Analytics / usage tracking SDKs | Not included |
| Crash reporting SDKs | Not included |
| Advertising or ad networks | Not included |
| Third-party sign-in (Google, Facebook, etc.) | Not included |
| In-app browser / unrestricted web access | Not included |
| Messaging or chat between users | Not included |
| User-generated content shared with others | Not included |
| Local, on-device storage only | Yes |
The "Ask & Learn" feature searches a fixed, built-in question bank on your device — it does not send your questions to us, to an AI service, or to any third party.
Deep Revision is designed for PSLE-level students (typically ages 10–12), used independently or alongside a parent. Because the app collects no personal information, requires no account, and sends no data to any server we operate, we do not knowingly collect personal data from children in the course of using this app. If you're a parent with a question about what the app stores, see the "Data handling" section above — the honest answer is: whatever is on the device, and nothing else.
Since all app data lives on your device, you already have full control over it:
There is no separate account or server-side copy for us to delete on your behalf, because none exists.
If we ever add a feature that changes how data is handled (for example, an optional cloud-sync feature in a future update), we'll update this page and the "Last updated" date above, and — where required — ask for your consent before the change takes effect.