It depends on how you feel about tracking: Sync.me declares data used to track you. The sensitive items are contacts and user content. In total the label lists 7 data types; 33% of contacts backup apps we checked declare tracking.
Sync.me privacy in one look
- 1Collects nothing
- 2Not linked
- 3Linked
- 4Tracks you
Built only from the developer's App Store label. It describes disclosure, not tested behaviour.
Sync.me's developer reports using identifiers to track you across other companies' apps and websites.
Did Sync.me ask for something?
Pick the permission prompt you saw. We compare it with what Sync.me's developer declared.
Location is not on Sync.me's label. That can be fine: data used only on your iPhone does not have to be declared. If the data would need to leave the phone for the feature to work, ask why it is missing.
Sync.me lists User Content on its label, linked to you. Choose Limited Access and pick only the photos you want to share.
Sync.me lists Contacts on its label, linked to you. Limited Access shares selected contacts instead of your whole address book.
Sync.me declares data used to track you, so expect the “Allow to track?” prompt. Tap Ask App Not to Track; the app must keep working without it.
Health & Fitness is not on Sync.me's label. That can be fine: data used only on your iPhone does not have to be declared. If the data would need to leave the phone for the feature to work, ask why it is missing.
A permission is what the app can reach on your iPhone; the label is what the developer says leaves it. They answer different questions.
What Sync.me collects, explained
| Data type | What it covers | Where to limit it |
|---|---|---|
| ContactsSensitiveLinked to you | The people in your address book or social graph. | Settings › Privacy & Security › Contacts: choose Limited Access to share only selected people, or None. |
| User ContentSensitiveLinked to you | Messages, photos, videos, audio recordings, documents and support chats you create or upload. | Settings › Privacy & Security › Photos: choose Limited Access or None; review Microphone and Files access too. |
| Contact InfoLinked to you | Your name, email address, phone number or postal address. | Use Sign in with Apple with Hide My Email where offered, and check the app's account and marketing preferences. |
| PurchasesLinked to you | What you have bought or tend to buy. | Review in-app marketing settings; subscriptions are listed in Settings › [your name] › Subscriptions. |
| IdentifiersUsed to track youLinked to youNot linked to you | An account ID, screen name, customer number or a device-level ID such as the advertising identifier. | Settings › Privacy & Security › Tracking: turn off Allow Apps to Request to Track, or tap Ask App Not to Track when prompted. |
| Usage DataNot linked to you | What you tap, open and view inside the app, plus which ads you have seen. | There is no single iOS switch. Look for an analytics or personalised-ads toggle in the app's own settings. |
| DiagnosticsNot linked to you | Crash logs, launch times, hang rates and energy use. | Settings › Privacy & Security › Analytics & Improvements › Share With App Developers controls what Apple passes on; the app's own crash reporting is separate. |
What Sync.me's label means for you
Sync.me's label has 1 type under “Data Used to Track You”, 5 types under “Data Linked to You”, 3 types under “Data Not Linked to You”. A data type can appear in more than one section when it is used for different purposes — for example, identifiers used for both analytics and advertising.
Tracking is the declaration that most separates apps. It means identifiers from Sync.me can be combined with data from other companies to target or measure ads, or shared with data brokers. On iOS 14.5 and later, the app must ask your permission before tracking you through the advertising identifier; answering “Ask App Not to Track” blocks that identifier and tells the developer you have declined.
The items that deserve the most attention are contacts and user content. Uploading contacts shares other people's details, not just yours.
Contacts backup apps upload your whole address book — other people's names, numbers and addresses, not just yours. Check where the backup is stored, whether it is encrypted, and how to delete it from the server.
Among the 126 contacts backup apps in our snapshot with a label, 33% declare tracking, 48% collect data linked to you and 33% say they collect nothing. Sync.me lists 7 data types, more than the average of 2.2 for this group.
Social apps are built around identity and contacts, so data linked to you is nearly universal. Tracking and contact upload are the settings worth checking.
Settings to check for Sync.me
- 1
Tracking
Settings › Privacy & Security › Tracking. If “Allow Apps to Request to Track” is off, apps cannot ask, and they are told to treat you as having declined. You can also turn it off for this app alone.
- 2
Photos
Settings › Privacy & Security › Photos. Limited Access lets you pick exactly which pictures the app can see; Add Photos Only lets it save without reading your library.
- 3
Contacts
Settings › Privacy & Security › Contacts. Limited Access shares only the people you select instead of your whole address book.
- 4
Sign-in
When creating an account, Sign in with Apple can give the app a relay address from Hide My Email instead of your real one.
- 5
Lock the app
On iOS 18 and later, touch and hold the icon and choose Require Face ID. Anyone who picks up your unlocked phone then needs your face, fingerprint or passcode to open it.
- 6
Notifications
Settings › Notifications › Sync.me › Show Previews: When Unlocked keeps message and account details off the Lock Screen.
Does Sync.me track you?
Identifiers. Apple defines tracking as linking data from this app with data from other companies' apps, websites or offline sources for targeted advertising or ad measurement, or sharing it with a data broker.
Lock Sync.me behind Face ID
- Find Sync.me on your Home Screen or in App Library.
- Touch and hold the icon until the quick-actions menu opens.
- Tap Require Face ID (or Require Touch ID / Require Passcode, depending on your iPhone).
- Tap Require Face ID again to confirm. Sync.me now asks for authentication every time it opens.
The lock is an iPhone feature, so it works whether or not Sync.me has a passcode of its own. It does not change what the app sends to its developer.
About Sync.me
| Developer | Sync.ME LTD |
| App Store category | Social Networking (also Productivity) |
| Latest version | 11.26.10, released October 2026 |
| First released | December 2009 |
| Requires | iOS 18.6 or later |
| Size | 240 MB |
| Age rating | 4+ |
| Languages | 17 (AR, DA, NL, EN, FR, DE, HE, HI…) |
| Bundle ID | com.ultimake.smartsync |
The current version shipped in October 2026, so the app is actively maintained and its label is likely current. Labels are updated by developers when practices change.
What the label cannot tell you
- A label is self-reported. Apple publishes the developer's answers and can reject apps that misrepresent them, but it does not independently verify what Sync.me sends.
- It does not say where data is stored, how long it is kept, whether it is encrypted, or which companies receive it. The privacy policy covers those points.
- Optional data counts: if a feature lets you add something (a profile photo, a phone number), the type is listed even if you never use the feature.
- Data handled only on your iPhone is not 'collected', so a no-collection label is compatible with an app that reads your files locally.
- Third-party sign-in, payment processors and SDKs are supposed to be included, but a label can lag behind a new version.
The question to ask Sync.me's developer: How do I delete my contacts from their server later?
Sync.me vs similar contacts backup apps
- Sync.me (this app)
- Backup My Contacts Plus
- Backup all contacts and export
- Contact Backup
- Contacts Backup Pro
- My Contact
- Contacts+ Sync for Google
Fewer types is not automatically safer: a cloud backup app has to collect your files to work. Compare like with like.
Look up any of our apps in seconds, or put two labels side by side.
Apps similar to Sync.me
All social networking → Who tracks you? A–Z → Apps that collect contacts → Privacy label decoder →
Your Sync.me privacy checklist
Done. You have applied every control the label points to.
True or false?
- Right.Not quite.
True: it lists identifiers under Data Used to Track You.
- Right.Not quite.
Labels are self-reported by developers. Apple can reject or remove apps that misrepresent practices, but it does not audit each label.
- Right.Not quite.
True: Contacts appears on its label.
- Right.Not quite.
It is collected and sent; the developer says it is de-identified rather than tied to your account or device.
- Right.Not quite.
Apple's rules require apps to work the same whether or not you allow tracking.