# Diary Books vs Solid Calendar

The clearest difference is review sentiment: Solid Calendar at 79% against Diary Books's 9%. Diary Books's advantage is monetization model (free with in-app purchases vs paid). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Diary Books sells 1 one-off in-app purchase and Solid Calendar sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Diary Books ships an update every 10 days, Solid Calendar fortnightly. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Diary Books | Solid Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (120 ratings)](https://appshunter.io/ios/app/solid-calendar/id6448245807/reviews)** |
| Number of ratings | — | **120** |
| Positive reviews | 8.7% of reviews | **78.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 4 MB | 19 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Alteru Inc.](https://appshunter.io/developer/434747758) | [Solid Apps S.R.L.](https://appshunter.io/developer/1653740418) |

## 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 |


### Solid Calendar

[App page](https://appshunter.io/ios/app/solid-calendar/id6448245807)

This app helps you manage your time, tasks, and events with a natural language interface. It acts as a digital planner, rotating schedule manager, and reminder system, syncing with your existing device calendars for seamless organization.

**Highlights:** Add events with natural language input, Calendar planner with intuitive interface, Digital planner for tasks and to-do lists, Rotating schedule management, Quick join for video calls, Reminders and smart notifications, Multiple layout options

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock this app (lifetime) | $4.99 | one-time |
| Unlock ALL 10 Solid Apps (lifetime) | $9.99 | one-time |

**What reviewers like**

- ✨ Brilliant app overall
- 👍 Easy to use interface
- 🎨 Visually appealing design
- 💰 Affordable one-time purchase
- 🚀 Fast loading and performance

**What reviewers complain about**

- 🤔 Account required for sync
- 📅 Weekly view horizontal events
- 🐛 Sync issues with date
- ❓ Widgets feel like afterthought
- 🐛 App crashes after update

**Reported bugs**

- Date is a day behind in Australia
- Jumps back to today's date when viewing future dates
- App crashes every time after last update
- Changing daily event time affects rest of week incorrectly
- Weekly view shows all-day events horizontally like timed events

**Requested features**

- Display checkmarks for finished appointments
- Better task management landing pad, floating to-dos
- Option to display little checkmarks for finished appointments
- Floating to-do's on widget page
- Option to display little checkmarks for finished appointments


## Frequently asked questions

### Is Diary Books free?

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

### Is Solid Calendar free?

Solid Calendar is free to download, with in-app purchases available.

### Do Diary Books or Solid Calendar have ads?

Neither Diary Books nor Solid Calendar shows ads.

### Which is updated more often, Diary Books or Solid Calendar?

Diary Books ships an update every 10 days, and Solid Calendar fortnightly. Most recently, Diary Books was updated on October 24, 2026 and Solid Calendar on October 27, 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.*