# Sool vs Flux Loop

The clearest difference is update cadence: Flux Loop at every 11 days against Sool's every 2 months. Flux Loop also leads on iOS requirement (15 vs 17.0). 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.

Sool ships an update every 2 months, Flux Loop every 11 days. The most recent releases landed on October 8, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Sool | Flux Loop |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 11 days** |
| Size | 4 MB | 8 MB |
| Requires iOS | 17.0 | **15** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Umit UZ](https://appshunter.io/developer/1842858860) | [旭萍 张](https://appshunter.io/developer/1882426038) |

## What reviewers say

### Sool

[App page](https://appshunter.io/ios/app/sool-quick-mathematic-trainer/id6756207263)

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

**In-app purchases:** none


### Flux Loop

[App page](https://appshunter.io/ios/app/flux-loop-energy-path/id6760285319)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sool free?

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

### Is Flux Loop free?

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

### Do Sool or Flux Loop have ads?

Neither Sool nor Flux Loop shows ads.

### Which is updated more often, Sool or Flux Loop?

Sool ships an update every 2 months, and Flux Loop every 11 days. Most recently, Sool was updated on October 8, 2026 and Flux Loop on September 28, 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.*