# Solid Diary vs Quadrix

The clearest difference is monetization model: Quadrix at free against Solid Diary's paid. Quadrix also leads on update cadence (fortnightly vs every 2 months). Solid Diary's advantage is ratings volume (26 vs 2). On price, rating, ads and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Solid Diary against 5.0 for Quadrix. That said, the two scores are not equally well evidenced: Solid Diary has 26 ratings behind it against 2, so its average is the more settled of the two.

Solid Diary ships an update every 2 months, Quadrix fortnightly. The most recent releases landed on September 23, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Solid Diary | Quadrix |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (26 ratings)](https://appshunter.io/ios/app/solid-diary/id6448245802/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/quadrix/id6755793425/reviews) |
| Number of ratings | **26** | 2 |
| Positive reviews | 86.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Paid | **Free** |
| Size | 44 MB | 42 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Solid Apps S.R.L.](https://appshunter.io/developer/1653740418) | [Learnzy, LLC](https://appshunter.io/developer/6776880061) |

## 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 |


### Quadrix

[App page](https://appshunter.io/ios/app/quadrix/id6755793425)

This productivity app helps users prioritize tasks using a matrix-based system. It offers features like reminders, calendar integration, and file attachments to streamline workflow and enhance organization for students, professionals, and entrepreneurs.

**Highlights:** Eisenhower Matrix prioritization, Task and project management, Reminders and calendar view, Attach voice notes, images, files, Quick search, print, preview, Distraction-free interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Quadrix | $1.99 | one-time |


## Frequently asked questions

### Is Solid Diary free?

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

### Is Quadrix free?

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

### Which has better reviews, Solid Diary or Quadrix?

Solid Diary and Quadrix are both rated 5.0 out of 5 on the App Store, from 26 and 2 ratings respectively.

### Do Solid Diary or Quadrix have ads?

Neither Solid Diary nor Quadrix shows ads.

### Which is updated more often, Solid Diary or Quadrix?

Solid Diary ships an update every 2 months, and Quadrix fortnightly. Most recently, Solid Diary was updated on September 23, 2026 and Quadrix on September 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.*