# Diary Mood Tracker vs Polyai

The clearest difference is price: Diary Mood Tracker at Free against Polyai's $3.99. Diary Mood Tracker also leads on in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 2 months). Polyai's advantage is ads (none vs shown). On device support there is nothing between them.

Diary Mood Tracker is free to download; Polyai costs $3.99 up front. Polyai sells 1 in-app purchase, starting at $2.99 per 7 days. Diary Mood Tracker asks for nothing beyond the download.

Diary Mood Tracker ships an update every 3 weeks, Polyai every 2 months. The most recent releases landed on August 19, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Diary Mood Tracker | Polyai |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Ad-supported | — |
| Size | 37 MB | 2 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | +17 | 4+ |
| Developer | [HONGKONG ADHEROS LIMITED](https://appshunter.io/developer/1788020856) | [WhatsGoodApps LLC](https://appshunter.io/developer/598069005) |

## What reviewers say

### Diary Mood Tracker

[App page](https://appshunter.io/ios/app/diary-mood-tracker/id6744306538)

Record your emotions, thoughts, and daily experiences in a private digital space. Express yourself freely through words and custom expressions to create a personal journal of your life's journey.

**Highlights:** Record emotions, Daily life journaling, Private digital space, Custom expressions, Express feelings freely

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

**In-app purchases:** none


### Polyai

[App page](https://appshunter.io/ios/app/polyai/id6748364979)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chat unlimited | $2.99 | per 7 days |


## Frequently asked questions

### Is Diary Mood Tracker free?

Diary Mood Tracker is free to download, with no in-app purchases.

### Is Polyai free?

Polyai costs $3.99, and also offers in-app purchases.

### Do Diary Mood Tracker or Polyai have ads?

Diary Mood Tracker shows ads; Polyai does not.

### Which is updated more often, Diary Mood Tracker or Polyai?

Diary Mood Tracker ships an update every 3 weeks, and Polyai every 2 months. Most recently, Diary Mood Tracker was updated on August 19, 2026 and Polyai on September 7, 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.*