# Spin4 vs DigitalHarmonyA

The clearest difference is update cadence: Spin4 at every 10 days against DigitalHarmonyA's every 5 months. Spin4 also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Spin4 ships an update every 10 days, DigitalHarmonyA every 5 months. The most recent releases landed on September 22, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Spin4 | DigitalHarmonyA |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 5 months |
| Size | 2 MB | 6 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [敏刚 易](https://appshunter.io/developer/1872259103) | [Hoang Hot Nguyen](https://appshunter.io/developer/6808550802) |

## What reviewers say

### Spin4

[App page](https://appshunter.io/ios/app/spin4-rotating-connect/id6759542403)

**Features:** Apple Watch app

**In-app purchases:** none


### DigitalHarmonyA

[App page](https://appshunter.io/ios/app/digitalharmonya/id6761405391)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Spin4 free?

Spin4 is free to download, with no in-app purchases.

### Is DigitalHarmonyA free?

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

### Do Spin4 or DigitalHarmonyA have ads?

Neither Spin4 nor DigitalHarmonyA shows ads.

### Which is updated more often, Spin4 or DigitalHarmonyA?

Spin4 ships an update every 10 days, and DigitalHarmonyA every 5 months. Most recently, Spin4 was updated on September 22, 2026 and DigitalHarmonyA on September 25, 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.*