It depends on how you feel about tracking: CalX declares data used to track you. The sensitive items are user content. In total the label lists 4 data types; 44% of privacy protection apps we checked declare tracking.
CalX 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.
CalX's developer reports using identifiers to track you across other companies' apps and websites.
Did CalX ask for something?
Pick the permission prompt you saw. We compare it with what CalX's developer declared.
Location is not on CalX'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.
CalX lists User Content on its label. Choose Limited Access and pick only the photos you want to share.
Contacts is not on CalX'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.
CalX 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 CalX'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 CalX collects, explained
| Data type | What it covers | Where to limit it |
|---|---|---|
| User ContentSensitiveNot linked 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 InfoNot linked 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. |
| IdentifiersUsed to track 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. |
| DiagnosticsLinked 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 CalX's label means for you
CalX's label has 1 type under “Data Used to Track You”, 1 type 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 CalX 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 user content. This is the content you actually care about. Where it is stored, who can read it and how it is backed up matters more than any other line on the label.
Privacy tools — VPNs, blockers and scanners — can see a lot of your traffic. A privacy app that collects identifiers or usage data deserves a careful read. Check whether the app logs traffic or DNS queries and who operates its servers.
Among the 147 privacy protection apps in our snapshot with a label, 44% declare tracking, 62% collect data linked to you and 22% say they collect nothing. CalX lists 4 data types, about the same as the average of 3.1 for this group.
Utilities range from calculators to VPNs, so their labels vary more than any other category. A simple tool that collects identifiers and usage data for tracking is a sign of advertising SDKs.
Settings to check for CalX
- 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
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.
- 4
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.
- 5
Notifications
Settings › Notifications › CalX › Show Previews: When Unlocked keeps message and account details off the Lock Screen.
Does CalX 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 CalX behind Face ID
- Find CalX 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. CalX now asks for authentication every time it opens.
The lock is an iPhone feature, so it works whether or not CalX has a passcode of its own. It does not change what the app sends to its developer.
About CalX
| Developer | Followal Infotech LLP |
| App Store category | Utilities (also Productivity) |
| Latest version | 5.2.55, released March 2025 |
| First released | July 2022 |
| Requires | iOS 16.1 or later |
| Size | 130 MB |
| Age rating | 17+ |
| Languages | 34 (AR, CA, HR, CS, DA, NL, EN, FI…) |
| Bundle ID | com.calculatorlock |
The current version shipped in March 2025, over a year before our snapshot. Older apps can lag behind iOS privacy features such as limited photo and contact access.
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 CalX 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 CalX's developer: Does the privacy app itself log what I do?
CalX vs similar privacy protection apps
- Trend Micro Mobile Security
- Kanary
- CalX (this app)
- Device Security & AI Shield
- IDX
- GuardOS
- Cyber XRay Internet Protection
- Phone Protection
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 CalX
All privacy protection apps → Who tracks you? A–Z → Apps that collect user content → Privacy label decoder →
Your CalX 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: User Content appears on its label, in the Not Linked to You section.
- 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.