# Calorie Wheel vs Private Diary & Lock

The clearest difference is in-app purchases: Calorie Wheel at none against Private Diary & Lock's 3. Calorie Wheel also leads on update cadence (every 2 days vs every 5 days). Private Diary & Lock's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Private Diary & Lock sells 3 in-app purchases, starting at $2.99 per month. Calorie Wheel asks for nothing beyond the download.

Calorie Wheel ships an update every 2 days, Private Diary & Lock every 5 days. The most recent releases landed on October 28, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Calorie Wheel | Private Diary & Lock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/private-diary-and-lock-scriptum/id6803934474/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 5 days |
| Monetization | — | Freemium |
| Size | 1 MB | 48 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Calorie Wheel](https://appshunter.io/developer/1876910872) | [ANNR Studio](https://appshunter.io/developer/6785540709) |

## What reviewers say

### Calorie Wheel

[App page](https://appshunter.io/ios/app/calorie-wheel/id6759104417)

**Features:** macOS Compatibility

**In-app purchases:** none


### Private Diary & Lock

[App page](https://appshunter.io/ios/app/private-diary-and-lock-scriptum/id6803934474)

This app provides a private digital journal experience where all entries are stored locally on your device. It offers daily prompts, voice-to-text input, photo attachments, and robust search capabilities. An optional upgrade unlocks advanced features like biometric lock, AI tidying, and PDF export.

**Highlights:** Daily writing prompts, Voice-to-text input, Photo and location attachments, Local storage and iCloud backup, Searchable journal entries, Optional AI writing assistance, PDF export

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $22.99 | per year |
| Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is Calorie Wheel free?

Calorie Wheel is free to download, with no in-app purchases.

### Is Private Diary & Lock free?

Private Diary & Lock is free to download, with in-app purchases available.

### Do Calorie Wheel or Private Diary & Lock have ads?

Neither Calorie Wheel nor Private Diary & Lock shows ads.

### Which is updated more often, Calorie Wheel or Private Diary & Lock?

Calorie Wheel ships an update every 2 days, and Private Diary & Lock every 5 days. Most recently, Calorie Wheel was updated on October 28, 2026 and Private Diary & Lock on November 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*