# System vs Happiness Tracker

The clearest difference is in-app purchases: System at none against Happiness Tracker's 1. System also leads on update cadence (every 8 days vs every 9 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Happiness Tracker sells 1 one-off in-app purchase. System asks for nothing beyond the download.

System ships an update every 8 days, Happiness Tracker every 9 months. The most recent releases landed on October 15, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | System | Happiness Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/system-understand-yourself/id6480427972/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 9 months |
| Monetization | Free | — |
| Size | 6 MB | 3 MB |
| Requires iOS | **17.0** | 18.1 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | +4 |
| Developer | [Matteo Dada](https://appshunter.io/developer/1551807661) | [Sergi Mateo](https://appshunter.io/developer/586875339) |

## What reviewers say

### System

[App page](https://appshunter.io/ios/app/system-understand-yourself/id6480427972)

This app helps you discover hidden patterns by connecting your daily behaviors and feelings. It provides a personal journal, an insights dashboard, and mapping tools to understand how actions influence emotions and vice versa, fostering self-awareness and data-driven growth.

**Highlights:** Personal journal for recording moments and feelings, Insights dashboard to visualize recurring behaviors and emotions, Behavior-emotion mapping to understand action-feeling connections, Emotion-action insights to see how feelings influence choices, Mindfulness encouragement with simple daily tracking, Data-driven growth through personal experience analysis

**Features:** macOS Compatibility

**In-app purchases:** none


### Happiness Tracker

[App page](https://appshunter.io/ios/app/happiness-tracker-moodis/id6738681849)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Moodis Plus | $4.99 | one-time |


## Frequently asked questions

### Is System free?

System is free to download, with no in-app purchases.

### Is Happiness Tracker free?

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

### Do System or Happiness Tracker have ads?

Neither System nor Happiness Tracker shows ads.

### Which is updated more often, System or Happiness Tracker?

System ships an update every 8 days, and Happiness Tracker every 9 months. Most recently, System was updated on October 15, 2026 and Happiness Tracker on October 11, 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.*