Help & FAQ

Sign in with Apple or Google before you can use the app. We do not offer email/password sign-up. There is no guest or anonymous mode.

Each account receives 3 free grading tries for the lifetime of that account. After that, you can buy try packs in the Store. Free tries do not expire.

Sign in again with the same Apple or Google account. Your free tries used, paid tries, purchase history, and grading history stay linked to that account. Sign Out (Account tab) takes you back through the welcome screens, then to sign-in again.

We use AI trained on PSLE Science marking rubrics. Your answer is analysed for key concepts, scientific keywords, and accuracy, the same way a PSLE examiner would mark it.

Tap "Report a mistake" on the result screen. We will review it within 24 hours and may add goodwill credits to your account if the error was on our side.

Apple handles all refunds. Visit reportaproblem.apple.com, find the purchase, and request a refund. If you have issues, email support@tinkertots.ai and we may offer additional tries as goodwill.

Your 3 free tries and paid try packs (Starter, Standard, Value) do not expire. The Unlimited plan renews monthly; subscription status follows Apple's renewal rules if you cancel.

All 5 PSLE Science themes: Diversity, Cycles, Systems, Interactions, and Energy. The AI is optimised for open-ended written answer questions.

Yes. We store only the grade results linked to your account, not the original images. All data is encrypted and stored on secure servers. We comply with Singapore's PDPA.

It is optimised for Primary 5 and 6 PSLE-level questions, but works reasonably well for earlier years too.

Only photos of PSLE Primary Science question and answer sheets. Do not upload personal photos, memes, or any non-educational content.

Our system screens uploads automatically. If prohibited content is detected, the upload is rejected, no credit is used, and the account holder receives a warning by email. If a second violation happens within six hours of the first, grading pauses for six hours as a cooling-off period. After a third violation (lifetime, regardless of timing), the account is permanently suspended.

We will tell you in the app and will not deduct a credit. Try better lighting, hold the phone steady, and crop to one question. If uploads are repeatedly unreadable, grading may pause briefly; we will email you with the reason and time.

No. Credits are only used for successful grading. Rejected uploads (policy or quality) do not consume credits.

Parents or guardians should email support@tinkertots.ai with the account email. We will review appeals within 1–3 business days.