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Is Diary AI Safe?

Diary AI privacy label · by Lachlan Sonter · checked November 2026

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

None declared

Linked to you
7types
Not linked to you
0types

None declared

Short answer

Mostly a question of trust: Diary AI collects data linked to you but declares no tracking. The sensitive items are sensitive info and user content. In total the label lists 7 data types; 32% of journal & diary apps we checked declare tracking.

At a glance

Diary AI 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

Diary AI collects 7 data types tied to your identity but declares no tracking.

Try it

Did Diary AI ask for something?

Pick the permission prompt you saw. We compare it with what Diary AI'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 Diary AI'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

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

Not on the label

Contacts is not on Diary AI'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.

Not declared on the label

Diary AI 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 Diary AI'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 Diary AI 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.
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.
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 DataLinked 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.
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.
Reading the label

What Diary AI's label means for you

Diary AI's label has 7 types under “Data 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.

Diary AI 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, user content, contact info, purchases, identifiers, usage data and diagnostics — 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 and user content. These are the categories data-protection laws treat as special. Few apps need them.

Journals collect your private thoughts, moods and often your location and photos. A lock screen inside the app is not the same as encryption of the synced entries. Check whether entries sync to the developer's server and whether that sync is end-to-end encrypted; export your journal regularly.

Among the 173 journal & diary apps in our snapshot with a label, 32% declare tracking, 54% collect data linked to you and 21% say they collect nothing. Diary AI lists 7 data types, more than the average of 2.9 for this group.

Health and fitness apps can read Apple Health data only for categories you approve, one by one. What they collect themselves is shown on the label.

On your iPhone

Settings to check for Diary AI

  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

    Health

    Health app › your profile picture › Apps › Diary AI. Turn categories on one at a time; the app cannot tell which ones you declined.

  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 › Diary AI › Show Previews: When Unlocked keeps message and account details off the Lock Screen.

Cross-app tracking

Does Diary AI track you?

No tracking declared

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

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

iOS 18 and later

Lock Diary AI behind Face ID

  1. Find Diary AI 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. Diary AI now asks for authentication every time it opens.

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

Lock or hide Diary AI: step-by-step guide →

From the App Store record

About Diary AI

DeveloperLachlan Sonter
App Store categoryHealth & Fitness (also Lifestyle)
Latest version2.0.2, released February 2026
First releasedNovember 2025
RequiresiOS 15.6 or later
Size56 MB
Age rating12+
Languages1 (EN)
Bundle IDcom.lachlansonter.Diary-AI

The current version shipped in February 2026. That is recent enough that the label should reflect current practices, but check the App Store page again before relying on it.

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 Diary AI 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 Diary AI's developer: Can anyone at the company read my entries?

How it compares

Diary AI vs similar journal & diary 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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All journal & diary apps → Who tracks you? A–Z → Apps that collect sensitive info → Privacy label decoder →

Do it now

Your Diary AI 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. Q1Diary AI's privacy label says it uses data to track you.
    Right.
    Not quite.

    False: there is no Data Used to Track You section on Diary AI'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. Q3Diary AI 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

Diary AI privacy FAQ

Is Diary AI safe to use?
Based on its App Store privacy label, diary AI collects 7 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 Diary AI track you?
No. Diary AI's label has no Data Used to Track You section.
What data does Diary AI collect?
Sensitive info, user content, contact info, purchases, identifiers, usage data and diagnostics. Of these, sensitive info, user content, contact info, purchases, identifiers, usage data and diagnostics are linked to your identity.
Who makes Diary AI?
Lachlan Sonter, according to the App Store. It was first released in November 2025 and the current version is 2.0.2.
Can I lock Diary AI with Face ID?
On iOS 18 or later, touch and hold Diary AI'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.
How does Diary AI compare with other journal & diary apps?
Across 173 journal & diary apps with labels in our snapshot, 32% declare tracking and 21% say they collect no data. Diary AI lists 7 data types against an average of 2.9.
Can anyone at the company read my entries?
The privacy label cannot answer that. Look for it in Diary AI's privacy policy or support pages, linked from the App Store listing. Check whether entries sync to the developer's server and whether that sync is end-to-end encrypted; export your journal regularly.
How do I delete my data from Diary AI?
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.
Facts on this page come from Diary AI on the App Store, as reported by the developer. Checked 2026-11-01. How we collect data · Report a correction