None declared
Mostly a question of trust: InkThink collects data linked to you but declares no tracking. None of it falls in Apple's most sensitive categories (health, financial, location, contacts or your own content). In total the label lists 3 data types; 41% of calendar planners we checked declare tracking.
InkThink 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.
InkThink collects 2 data types tied to your identity but declares no tracking.
Did InkThink ask for something?
Pick the permission prompt you saw. We compare it with what InkThink's developer declared.
Location is not on InkThink'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.
User Content is not on InkThink'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.
Contacts is not on InkThink'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.
InkThink declares no tracking, so a tracking prompt would contradict its label. Decline it, and consider reporting the mismatch to Apple.
Health & Fitness is not on InkThink'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 InkThink collects, explained
| Data type | What it covers | Where to limit it |
|---|---|---|
| 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. |
| 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. |
What InkThink's label means for you
InkThink's label has 2 types under “Data Linked to You”, 1 type 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.
InkThink 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 — contact info and identifiers — is still tied to your identity, typically through an account, and is covered by the developer's privacy policy and retention rules.
None of the data types fall into the categories most people consider sensitive: health, financial information, precise location, contacts, browsing history or the content you create.
Calendars reveal where you will be and who you meet. Planner apps may also read your other calendars and reminders. Check the Calendars permission level (full access or add-only) in Settings › Privacy & Security › Calendars.
Among the 152 calendar planners in our snapshot with a label, 41% declare tracking, 60% collect data linked to you and 26% say they collect nothing. InkThink lists 3 data types, about the same as the average of 2.9 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.
Settings to check for InkThink
- 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
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.
- 3
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.
- 4
Notifications
Settings › Notifications › InkThink › Show Previews: When Unlocked keeps message and account details off the Lock Screen.
Does InkThink track you?
There is no “Data Used to Track You” section on InkThink's label.
Lock InkThink behind Face ID
- Find InkThink 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. InkThink now asks for authentication every time it opens.
The lock is an iPhone feature, so it works whether or not InkThink has a passcode of its own. It does not change what the app sends to its developer.
About InkThink
| Developer | Sundaram Applied Technologies Inc. |
| App Store category | Productivity (also Business) |
| Latest version | 1375, released October 2026 |
| First released | February 2026 |
| Requires | iOS 15.0 or later |
| Size | 213 MB |
| Age rating | 4+ |
| Languages | 4 (EN, FR, PT, ES) |
| Bundle ID | com.sat.inkthink |
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 InkThink 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 InkThink's developer: Does it need to read my calendars, or only add events?
InkThink vs similar calendar planners
- GrowIt
- NurseGrid Nurse Shift Calendar
- CC31
- InkThink (this app)
- ParkerPlanner
- Palu
- Calvetica Calendar
- myCal PRO Planner
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 InkThink
All calendar planners → Who tracks you? A–Z → Apps that collect contact info → Privacy label decoder →
Your InkThink privacy checklist
Done. You have applied every control the label points to.
True or false?
- Right.Not quite.
False: there is no Data Used to Track You section on InkThink's label.
- 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: Contact Info 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.