# Sigma vs 膳识家

Sigma and 膳识家 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Sigma ships an update weekly, 膳识家 fortnightly. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Sigma | 膳识家 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (56 ratings)](https://appshunter.io/ios/app/sigma-ai/id6743433033/reviews)** | — |
| Number of ratings | **56** | — |
| Positive reviews | 86.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Free | — |
| Size | 232 MB | 89 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Chaoshi Technology (Shanghai) Co., Ltd.](https://appshunter.io/developer/1520053656) | [Shenzhen Dayong Intelligent Technology Co., Ltd.](https://appshunter.io/developer/1824916170) |

## What reviewers say

### Sigma

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

This app offers a distraction-free running experience with detailed daily, weekly, and monthly analysis of your runs. It visualizes your running data and creates a map diary of your routes and moods, with AI-powered personalized coaching based on your history.

**Highlights:** Distraction-free running recording, Daily, weekly, monthly analysis, Map diary of routes and moods, AI-powered personalized coaching, Visualized calorie consumption, Data migration from multiple devices

**In-app purchases:** none


### 膳识家

[App page](https://appshunter.io/ios/app/id6748268940)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sigma free?

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

### Is 膳识家 free?

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

### Do Sigma or 膳识家 have ads?

Neither Sigma nor 膳识家 shows ads.

### Which is updated more often, Sigma or 膳识家?

Sigma ships an update weekly, and 膳识家 fortnightly. Most recently, Sigma was updated on November 4, 2026 and 膳识家 on November 5, 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.*