# 跑鸭·RunYay vs Sigma

The clearest difference is rating: 跑鸭·RunYay at 4.9 against Sigma's 4.5. 跑鸭·RunYay also leads on review sentiment (95% vs 87%). Sigma's advantage is iOS requirement (14.0 vs 16.0). On price, ratings volume, update cadence and ads there is nothing between them.

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

跑鸭·RunYay holds the better App Store score, 4.9 against 4.5. Both are backed by a comparable volume of ratings — 41 and 55 respectively. Written reviews point the same way: 95% of 跑鸭·RunYay's written reviews are positive against 87% of Sigma's.

跑鸭·RunYay ships an update every 10 days, Sigma weekly. Both last shipped on October 28, 2026.

## The numbers

| Metric | 跑鸭·RunYay | Sigma |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (41 ratings)](https://appshunter.io/ios/app/runyay/id6741685540/reviews)** | [4.5 (55 ratings)](https://appshunter.io/ios/app/sigma-ai/id6743433033/reviews) |
| Number of ratings | 41 | **55** |
| Positive reviews | **95.2% of reviews** | 86.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | Free | Free |
| Size | 104 MB | 231 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [Chengdu Hodoya Technology Co., Ltd.](https://appshunter.io/developer/1794503946) | [Chaoshi Technology (Shanghai) Co., Ltd.](https://appshunter.io/developer/1520053656) |

## What reviewers say

### 跑鸭·RunYay

[App page](https://appshunter.io/ios/app/runyay/id6741685540)

This app offers a clean interface for tracking and analyzing your runs. It allows you to create training plans, view detailed statistics like heatmaps and performance analysis, and discover official races to join.

**Highlights:** Clean and intuitive interface, Customizable training plans, Detailed run statistics and analysis, Heatmap and trajectory visualization, Official race discovery and registration, Calendar view of running history

**Features:** macOS Compatibility, 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 跑鸭·RunYay free?

跑鸭·RunYay is free to download, with no in-app purchases.

### Is Sigma free?

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

### Which has better reviews, 跑鸭·RunYay or Sigma?

跑鸭·RunYay is rated higher. 跑鸭·RunYay averages 4.9 out of 5 from 41 ratings, while Sigma averages 4.5 from 55 ratings.

### Do 跑鸭·RunYay or Sigma have ads?

Neither 跑鸭·RunYay nor Sigma shows ads.

### Which is updated more often, 跑鸭·RunYay or Sigma?

跑鸭·RunYay ships an update every 10 days, and Sigma weekly. Most recently, 跑鸭·RunYay was updated on October 28, 2026 and Sigma on October 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.*