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Is Zefiro Safe?

Zefiro privacy label · by Funambol, Inc · checked November 2026

  • Recently updated
App Privacy label Developer-reported · checked November 1, 2026
Used to track you
0types

None declared

Linked to you
6types
Not linked to you
3types
Short answer

Mostly a question of trust: Zefiro collects data linked to you but declares no tracking. The sensitive items are sensitive info, contacts and user content. In total the label lists 8 data types; 29% of cloud storage apps we checked declare tracking.

At a glance

Zefiro privacy in one look

Data exposure on the label
Linked to you
  1. 1
  2. 2
  3. 3
  4. 4

Built only from the developer's App Store label. It describes disclosure, not tested behaviour.

Verdict from the label
Linked to you, no tracking

Zefiro collects 6 data types tied to your identity but declares no tracking.

Try it

Did Zefiro ask for something?

Pick the permission prompt you saw. We compare it with what Zefiro's developer declared.

It asked me for access to…
Tap a prompt to compare it with the label.
Not on the label

Location is not on Zefiro'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.

Matches the label

Zefiro lists User Content on its label, linked to you. Choose Limited Access and pick only the photos you want to share.

Matches the label

Zefiro lists Contacts on its label, linked to you. Limited Access shares selected contacts instead of your whole address book.

Not declared on the label

Zefiro declares no tracking, so a tracking prompt would contradict its label. Decline it, and consider reporting the mismatch to Apple.

Not on the label

Health & Fitness is not on Zefiro'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.

Line by line

What Zefiro collects, explained

Data typeWhat it coversWhere to limit it
Sensitive InfoSensitiveLinked to you Racial or ethnic data, sexual orientation, pregnancy, disability, beliefs, union membership, genetic or biometric data. Share only what the app needs and check whether the label lists this data as linked to you.
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 youNot 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.
IdentifiersLinked 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.
Other DataLinked to you Any data the developer did not fit into Apple's named categories. Read the app's privacy policy, linked from its App Store page.
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.
Reading the label

What Zefiro's label means for you

Zefiro's label has 6 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.

Zefiro declares no tracking, which means the developer says it does not combine your data with other companies' data for advertising or sell it to data brokers. The data linked to you — sensitive info, contacts, user content, contact info, identifiers and other data — is still tied to your identity, typically through an account, and is covered by the developer's privacy policy and retention rules.

The items that deserve the most attention are sensitive info, contacts and user content. These are the categories data-protection laws treat as special. Few apps need them.

Cloud storage apps exist to move your files off the phone, so collecting user content is expected. What differs is encryption, sharing defaults and what the provider can read. Review automatic camera upload, shared-link expiry and whether client-side encryption is available.

Among the 170 cloud storage apps in our snapshot with a label, 29% declare tracking, 64% collect data linked to you and 24% say they collect nothing. Zefiro lists 8 data types, more than the average of 3.3 for this group.

Productivity apps tend to collect the work you do in them — documents, notes and files — so User Content is common. The question is whether it syncs to the developer's servers and how it is protected there.

On your iPhone

Settings to check for Zefiro

  1. 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. 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. 3

    Contacts

    Settings › Privacy & Security › Contacts. Limited Access shares only the people you select instead of your whole address book.

  4. 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. 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. 6

    Notifications

    Settings › Notifications › Zefiro › Show Previews: When Unlocked keeps message and account details off the Lock Screen.

Cross-app tracking

Does Zefiro track you?

No tracking declared

There is no “Data Used to Track You” section on Zefiro's label.

Does Zefiro track you? Full answer and how to stop it →

iOS 18 and later

Lock Zefiro behind Face ID

  1. Find Zefiro on your Home Screen or in App Library.
  2. Touch and hold the icon until the quick-actions menu opens.
  3. Tap Require Face ID (or Require Touch ID / Require Passcode, depending on your iPhone).
  4. Tap Require Face ID again to confirm. Zefiro now asks for authentication every time it opens.

The lock is an iPhone feature, so it works whether or not Zefiro has a passcode of its own. It does not change what the app sends to its developer.

From the App Store record

About Zefiro

DeveloperFunambol, Inc
App Store categoryProductivity (also Photo & Video)
Latest version32.1.2026100912, released October 2026
First releasedJuly 2017
RequiresiOS 16.0 or later
Size365 MB
Age rating4+
Languages3 (EN, IT, RU)
Bundle IDcom.funambol.zefiro

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.

Read with care

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 Zefiro 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 Zefiro's developer: Can the provider scan or read the files I upload?

How it compares

Zefiro vs similar cloud storage apps

Data types listed on each App Store privacy label
Tracks youLinked to youNot linkedCollects nothing

Fewer types is not automatically safer: a cloud backup app has to collect your files to work. Compare like with like.

Checking another app?

Look up any of our apps in seconds, or put two labels side by side.

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Do it now

Your Zefiro privacy checklist

Tick what you have done
Tick each step as you do it on your iPhone.

Done. You have applied every control the label points to.

Quick quiz

True or false?

  1. Q1Zefiro's privacy label says it uses data to track you.
    Right.
    Not quite.

    False: there is no Data Used to Track You section on Zefiro's label.

  2. Q2Apple tests every app to confirm its privacy label is accurate.
    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.

  3. Q3Zefiro collects Sensitive Info.
    Right.
    Not quite.

    True: Sensitive Info appears on its label.

  4. Q4Data “Not Linked to You” is never sent off your iPhone.
    Right.
    Not quite.

    It is collected and sent; the developer says it is de-identified rather than tied to your account or device.

  5. Q5Tapping “Ask App Not to Track” can stop an app from working.
    Right.
    Not quite.

    Apple's rules require apps to work the same whether or not you allow tracking.

Questions people ask

Zefiro privacy FAQ

Is Zefiro safe to use?
Based on its App Store privacy label, zefiro collects 6 data types tied to your identity but declares no tracking. Whether that is acceptable depends on what you will store in it. The label is developer-reported, not an independent security test.
Does Zefiro track you?
No. Zefiro's label has no Data Used to Track You section.
What data does Zefiro collect?
Sensitive info, contacts, user content, contact info, identifiers, usage data, other data and diagnostics. Of these, sensitive info, contacts, user content, contact info, identifiers and other data are linked to your identity.
Who makes Zefiro?
Funambol, Inc, according to the App Store. It was first released in July 2017 and the current version is 32.1.2026100912.
Can I lock Zefiro with Face ID?
On iOS 18 or later, touch and hold Zefiro's icon and choose Require Face ID (or Touch ID / Passcode). This is an iPhone feature and works for most downloaded apps, whether or not the app has its own lock. If you don't see the option, update iOS.
How does Zefiro compare with other cloud storage apps?
Across 170 cloud storage apps with labels in our snapshot, 29% declare tracking and 24% say they collect no data. Zefiro lists 8 data types against an average of 3.3.
Can the provider scan or read the files I upload?
The privacy label cannot answer that. Look for it in Zefiro's privacy policy or support pages, linked from the App Store listing. Review automatic camera upload, shared-link expiry and whether client-side encryption is available.
How do I delete my data from Zefiro?
Apps that let you create an account must also let you start account deletion from inside the app (an App Store rule since June 2022). Deleting the app from your iPhone alone does not delete data already sent to the developer.

For photos and documents you choose to keep apart from your main library, see VaultForYou.

Facts on this page come from Zefiro on the App Store, as reported by the developer. Checked 2026-11-01. How we collect data · Report a correction