# Solid Diary vs Expense Tracker AI

The clearest difference is price: Solid Diary at Free against Expense Tracker AI's $0.99. Solid Diary also leads on update cadence (every 2 months vs every 5 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Solid Diary is free to download; Expense Tracker AI costs $0.99 up front. Solid Diary sells 2 one-off in-app purchases and Expense Tracker AI sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Solid Diary ships an update every 2 months, Expense Tracker AI every 5 months. The most recent releases landed on September 29, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Solid Diary | Expense Tracker AI |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| 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** | Every 5 months |
| Monetization | Paid | — |
| Size | 44 MB | 4 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 |


### Expense Tracker AI

[App page](https://appshunter.io/ios/app/expense-tracker-ai-spendiq/id6758729622)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SpendIQ Premium | $4.99 | per month |
| SpendIQ Premium Annual | $39.99 | per year |


## Frequently asked questions

### Is Solid Diary free?

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

### Is Expense Tracker AI free?

Expense Tracker AI costs $0.99, and also offers in-app purchases.

### Do Solid Diary or Expense Tracker AI have ads?

Neither Solid Diary nor Expense Tracker AI shows ads.

### Which is updated more often, Solid Diary or Expense Tracker AI?

Solid Diary ships an update every 2 months, and Expense Tracker AI every 5 months. Most recently, Solid Diary was updated on September 29, 2026 and Expense Tracker AI on September 26, 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.*