BackmarkPrivacy Policy
Backmark has no accounts and no server of its own. Your collection, photos and notes stay on your iPhone. The only thing that ever leaves it is what is needed to identify an item, and only after you agree.
What stays on your iPhone
Every scan, its photo, the result, your notes, your folders and the names you give items are stored on the device. They are not uploaded to us, because there is no account and no database of ours to upload them to. Deleting a scan or an item removes its photo from the device. Deleting the app removes everything.
What is sent to identify an item
To identify an item, the app sends the photo you took and any details you typed to Google's Gemini model through Firebase AI Logic on Google Cloud. Location data is removed from the photo before it is stored or sent.
Before the first scan the app explains this and asks for your permission. Nothing is sent until you agree. You can withdraw the permission at any time in Settings, under Photos and AI, and the next scan will ask again.
Under Google Cloud's Service Specific Terms, Google does not use this content to train or fine-tune its models. Google may keep it for a limited time to detect abuse. See Google Cloud Service Specific Terms.
Anonymous usage statistics
The app sends anonymous product events (for example that a scan started, or that a result was saved) to PostHog, so that it can be improved. These events never contain your photos, item names, makers, mark text, notes, folder names, values or searches.
There are no ads inside the app.
Measuring our ads
Backmark is advertised on Facebook and Instagram. To learn whether those ads lead to installs, the app includes Meta's software development kit. It tells Meta that the app was installed and opened, that a scan reached a result, and that a purchase was made, together with basic device information such as the iPhone model, iOS version and language. It never sends your photos, item names, makers, notes, values or searches.
The app does not ask for permission to track you, so Meta receives no advertising identifier. Installs from ads are counted through Apple's SKAdNetwork, which reports them without saying who you are. Meta handles this information under its own Privacy Policy.
Exchange rates and marketplace links
To show values in your currency, the app downloads the European Central Bank's public daily exchange rates file. Nothing about you is sent with that request. The Look for Similar Items rows open eBay or, in Türkiye, sahibinden.com in Safari with the item's name as the search; the app itself fetches nothing from those sites.
Purchases
Purchases are handled by Apple. Backmark uses RevenueCat to check whether a purchase is active. Your payment details never reach the app or the developer.
What the App Store privacy label says
| Data | Purpose | Linked to you | Used for tracking |
|---|---|---|---|
| Photos | App functionality | No | No |
| Other user content (details you type) | App functionality | No | No |
| Product interaction | Analytics, developer's advertising | No | No |
| Purchase history | App functionality, developer's advertising | No | No |
| Other data (device information) | Analytics, developer's advertising | No | No |
Nothing else is collected. No location, no contacts, no health data, no identifiers for tracking.
Children
Backmark is made for adults who buy, sell, inherit or research antiques. It is not directed to children and is not intended for them.
Your choices
- Withdraw the permission to send photos, in Settings, under Photos and AI.
- Delete any scan or saved item in the app, which removes its photo from the device.
- Delete the app, which removes everything it stored.
People in Türkiye
The information notice under Türkiye's Personal Data Protection Law (KVKK) is on the Turkish version of this page.
Contact
Questions about this policy: irfanbehic@gmail.com.
Changes
If this policy changes, the new version appears on this page with a new date below.
Last updated 5 October 2026.