# PowerFun vs Sigma

The clearest difference is update cadence: Sigma at weekly against PowerFun's monthly. Sigma also leads on iOS requirement (14.0 vs 16.2). 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.

PowerFun ships an update monthly, Sigma weekly. The most recent releases landed on October 4, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | PowerFun | Sigma |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (52 ratings)](https://appshunter.io/ios/app/sigma-ai/id6743433033/reviews)** |
| Number of ratings | — | **52** |
| Positive reviews | — | 86.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | — | Free |
| Size | 578 MB | 231 MB |
| Requires iOS | 16.2 | **14.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [上海执行派运动发展有限公司](https://appshunter.io/developer/1137494875) | [Chaoshi Technology (Shanghai) Co., Ltd.](https://appshunter.io/developer/1520053656) |

## What reviewers say

### PowerFun

[App page](https://appshunter.io/ios/app/powerfun/id6444202305)

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

**In-app purchases:** none


### Sigma

[App page](https://appshunter.io/ios/app/sigma-ai/id6743433033)

This app offers a clean and engaging running experience with detailed analysis and personalized AI coaching. Track your runs, visualize your progress, and collect memories of your journeys on a unique map diary.

**Highlights:** Ad-free running experience, Daily, weekly, and monthly analysis, Map diary of runs and moods, AI-powered personalized coaching, Visualized calorie consumption, Data migration from popular wearables

**In-app purchases:** none


## Frequently asked questions

### Is PowerFun free?

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

### Is Sigma free?

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

### Do PowerFun or Sigma have ads?

Neither PowerFun nor Sigma shows ads.

### Which is updated more often, PowerFun or Sigma?

PowerFun ships an update monthly, and Sigma weekly. Most recently, PowerFun was updated on October 4, 2026 and Sigma on October 16, 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.*