# KULG vs Fasted Harmony

The clearest difference is in-app purchases: KULG at none against Fasted Harmony's 2. Fasted Harmony's advantage is iOS requirement (16.6 vs 18.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Fasted Harmony sells 2 in-app purchases, starting at $4.99 per month. KULG asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on August 29, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | KULG | Fasted Harmony |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 20 MB | 52 MB |
| Requires iOS | 18.2 | **16.6** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 12+ |
| Developer | [Kulgio OÜ](https://appshunter.io/developer/1834211833) | [Larvotto Ventures LLC](https://appshunter.io/developer/1892090570) |

## What reviewers say

### KULG

[App page](https://appshunter.io/ios/app/kulg/id6751247364)

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

**In-app purchases:** none


### Fasted Harmony

[App page](https://appshunter.io/ios/app/fasted-harmony-cycle-syncing/id6763795183)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $4.99 | per month |
| Premium Yearly | $45.99 | per year |


## Frequently asked questions

### Is KULG free?

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

### Is Fasted Harmony free?

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

### Do KULG or Fasted Harmony have ads?

Neither KULG nor Fasted Harmony shows ads.

### Which is updated more often, KULG or Fasted Harmony?

KULG ships an update every 3 weeks, and Fasted Harmony every 3 weeks. Most recently, KULG was updated on August 29, 2026 and Fasted Harmony on September 6, 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.*