# Solid Diary vs AI Plagiarism Check PRO

The clearest difference is price: Solid Diary at Free against AI Plagiarism Check PRO's $1.99. AI Plagiarism Check PRO's advantage is update cadence (fortnightly vs every 2 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Solid Diary is free to download; AI Plagiarism Check PRO costs $1.99 up front. Solid Diary sells 2 one-off in-app purchases and AI Plagiarism Check PRO sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Solid Diary ships an update every 2 months, AI Plagiarism Check PRO fortnightly. Both last shipped on October 12, 2026.

## The numbers

| Metric | Solid Diary | AI Plagiarism Check PRO |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[5.0 (26 ratings)](https://appshunter.io/ios/app/solid-diary/id6448245802/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | 86.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 44 MB | 6 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Solid Apps S.R.L.](https://appshunter.io/developer/1653740418) | [Aneesh Pradeep](https://appshunter.io/developer/1836157821) |

## What reviewers say

### Solid Diary

[App page](https://appshunter.io/ios/app/solid-diary/id6448245802)

This private journal app offers AI-powered insights into your thoughts and emotions. Secure your entries with encryption and biometric locks. Organize your reflections with formatting, tags, and unlimited uploads of images, voice, and sketches.

**Highlights:** 100% private and encrypted diary, AI analysis for deeper insights, Unlimited image, voice, and sketch uploads, Formatting and tagging for organization, Customizable themes, Stats and achievements

**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 |


### AI Plagiarism Check PRO

[App page](https://appshunter.io/ios/app/ai-plagiarism-check-pro/id6787827048)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Credits | $3.99 | one-time |
| 25 Credits | $8.99 | one-time |
| 60 Credits | $17.99 | one-time |
| 120 Credits | $34.99 | one-time |


## Frequently asked questions

### Is Solid Diary free?

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

### Is AI Plagiarism Check PRO free?

AI Plagiarism Check PRO costs $1.99, and also offers in-app purchases.

### Do Solid Diary or AI Plagiarism Check PRO have ads?

Neither Solid Diary nor AI Plagiarism Check PRO shows ads.

### Which is updated more often, Solid Diary or AI Plagiarism Check PRO?

Solid Diary ships an update every 2 months, and AI Plagiarism Check PRO fortnightly. Most recently, Solid Diary was updated on October 12, 2026 and AI Plagiarism Check PRO on October 12, 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.*