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An empty result means the engine found no visually similar face in its index of public images. It does not mean the photo is absent from the internet — the index is large but never complete.

Things that improve a search:

• Use a photo where the face is sharp, well lit and facing roughly forward.
• Frame a single face inside the reticle. Group photos confuse the engine.
• Avoid heavy filters, sunglasses, masks and extreme angles.
• Try a different photo of the same person.

A search that returns nothing still consumes a credit, because the sweep ran.

Credits are granted by our server once Apple confirms the purchase. This usually takes a few seconds but can occasionally take longer.

Close and reopen the App, then check the credit badge on the home screen. If the balance is still wrong after a few minutes, tap Restore purchases on the paywall. If that does not resolve it, email us with your device identifier and the approximate time of purchase, and we will correct the balance manually.

Sherlock Ai has no sign-in. Your credits are attached to an identifier stored in your iCloud Keychain, which normally restores itself when you reinstall or move to a new device using the same Apple ID.

If iCloud Keychain is turned off, or you moved to a different platform, the identifier cannot be recovered and neither can unused credits. Turning on iCloud Keychain before reinstalling avoids this. An active subscription can always be restored with Restore purchases.

Subscriptions are managed by Apple, not by us. On your device open Settings → your name → Subscriptions, select Sherlock Ai and tap Cancel. Cancel at least 24 hours before the period ends to avoid the next charge. Deleting the App does not cancel a subscription.

All payments are processed by Apple, so refunds are granted by Apple under their policies — we have no ability to issue them. Request one at reportaproblem.apple.com.

Each result carries a similarity score from the search engine. Roughly: 90 and above is a near-certain visual match, 80–89 is strong, 70–79 is possible, and anything below 70 is best treated as noise.

A score compares images, not identities. Even a very high score is not proof that two photos show the same person. Always open the source page and judge it yourself.

It is cropped on your device, sent over an encrypted connection to our search provider to run one search, and deleted immediately afterwards. We never store it, and we never use it for training. Full detail is in the Privacy Policy.

In the App, open Account → Delete my data. This erases your search history, saved thumbnails and preferences from the device. Uninstalling the App removes them too.

To also delete your server-side record — the credit balance and invite mapping — email us your device identifier. Note this destroys any unused paid credits.

Searches time out automatically after four minutes and do not consume a credit when they fail. Force-close the App and reopen it. If the problem repeats, email us with your device model, iOS version and roughly when it happened — crash diagnostics reach us through Crashlytics and your report helps us match them up.

We do not host the images or pages that appear in results, and we do not maintain the search index. The report and removal page explains what we can do and where a removal request has to go.