# Motion Metrics vs RainArc

The clearest difference is in-app purchases: Motion Metrics at none against RainArc's 1. RainArc's advantage is update cadence (every 3 weeks vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. RainArc sells 1 one-off in-app purchase. Motion Metrics asks for nothing beyond the download.

Motion Metrics ships an update every 4 months, RainArc every 3 weeks. Both last shipped on September 9, 2026.

## The numbers

| Metric | Motion Metrics | RainArc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/motion-metrics/id6738306429/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 6 MB | 13 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Strange Design Studio, LLC](https://appshunter.io/developer/1780101524) | [Fazry Rachman Susanto](https://appshunter.io/developer/1827368574) |

## What reviewers say

### Motion Metrics

[App page](https://appshunter.io/ios/app/motion-metrics/id6738306429)

This app visualizes your exercise data from Apple Health, offering insights and trends without requiring manual input or subscriptions. It automatically syncs with your Apple Watch data to provide a passive and intuitive experience for various activities.

**Highlights:** Automatic Apple Health sync, Passive data insights, Smart summaries and visualizations, Tracks swimming, walking, running, elliptical, meditation, No setup required, Calm, passive experience

**Features:** macOS Compatibility

**In-app purchases:** none


### RainArc

[App page](https://appshunter.io/ios/app/rainarc/id6752736866)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tambah 2 Habit | $0.99 | one-time |


## Frequently asked questions

### Is Motion Metrics free?

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

### Is RainArc free?

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

### Do Motion Metrics or RainArc have ads?

Neither Motion Metrics nor RainArc shows ads.

### Which is updated more often, Motion Metrics or RainArc?

Motion Metrics ships an update every 4 months, and RainArc every 3 weeks. Most recently, Motion Metrics was updated on September 9, 2026 and RainArc on September 9, 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.*