# Diary Books vs Calculator 4U

The clearest difference is in-app purchases: Calculator 4U at none against Diary Books's 1. Diary Books's advantage is update cadence (every 10 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Diary Books sells 1 one-off in-app purchase. Calculator 4U asks for nothing beyond the download.

Diary Books ships an update every 10 days, Calculator 4U every 3 weeks. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Diary Books | Calculator 4U |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 8.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 2 MB |
| Requires iOS | **17.0** | 18.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Alteru Inc.](https://appshunter.io/developer/434747758) | [Naseer Mohammed](https://appshunter.io/developer/1794812503) |

## What reviewers say

### Diary Books

[App page](https://appshunter.io/ios/app/diary-books/id353283040)

Record daily memories, thoughts, and special moments in a beautifully designed personal journal. Organize entries into distinct diary books for different life events, people, or goals. This app offers a private and simple space to capture your life stories and revisit cherished memories.

**Highlights:** Create multiple diary books, Write daily journal entries, Organize memories by year, topic, or person, Elegant diary-book design, Face ID support, Private journaling space

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diary Books App Purchase | $4.99 | one-time |


### Calculator 4U

[App page](https://appshunter.io/ios/app/calculator-4u/id6741595255)

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

**In-app purchases:** none


## Frequently asked questions

### Is Diary Books free?

Diary Books is free to download, with in-app purchases available.

### Is Calculator 4U free?

Calculator 4U is free to download, with no in-app purchases.

### Do Diary Books or Calculator 4U have ads?

Neither Diary Books nor Calculator 4U shows ads.

### Which is updated more often, Diary Books or Calculator 4U?

Diary Books ships an update every 10 days, and Calculator 4U every 3 weeks. Most recently, Diary Books was updated on October 24, 2026 and Calculator 4U on October 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.*