# Sigma vs VaBridge

The clearest difference is rating: VaBridge at 5.0 against Sigma's 4.5. VaBridge also leads on update cadence (every 3 days vs weekly). Sigma's advantage is in-app purchases (none vs 2) and ratings volume (56 vs 2). On price, ads and device support there is nothing between them.

Both are free to download. VaBridge sells 2 in-app purchases, starting at $0.99 per month. Sigma asks for nothing beyond the download.

VaBridge holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Sigma has 56 ratings behind it against 2, so its average is the more settled of the two.

Sigma ships an update weekly, VaBridge every 3 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Sigma | VaBridge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (56 ratings)](https://appshunter.io/ios/app/sigma-ai/id6743433033/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/vabridge-virtual-cycling/id6760693656/reviews)** |
| Number of ratings | **56** | 2 |
| Positive reviews | 86.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | **Free** | Freemium |
| Size | 232 MB | 86 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Chaoshi Technology (Shanghai) Co., Ltd.](https://appshunter.io/developer/1520053656) | [DavidApp](https://appshunter.io/developer/413898792) |

## 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


### VaBridge

[App page](https://appshunter.io/ios/app/vabridge-virtual-cycling/id6760693656)

Relive your past workouts by riding real routes indoors with a virtual companion. Create shareable static or animated posters from your activities, combining routes, data, and photos.

**Highlights:** Virtual cycling with past self, Ride real Strava routes indoors, Static activity posters, Animated journey videos, 3D route environments, Performance comparison

**Features:** macOS Compatibility, Family Sharing, Vision Pro support, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VaBridge Pro Monthly | $0.99 | per month |
| VaBridge Pro Yearly | $7.99 | per year |


## Frequently asked questions

### Is Sigma free?

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

### Is VaBridge free?

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

### Which has better reviews, Sigma or VaBridge?

VaBridge is rated higher. Sigma averages 4.5 out of 5 from 56 ratings, while VaBridge averages 5.0 from 2 ratings.

### Do Sigma or VaBridge have ads?

Neither Sigma nor VaBridge shows ads.

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

Sigma ships an update weekly, and VaBridge every 3 days. Most recently, Sigma was updated on October 30, 2026 and VaBridge on October 31, 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.*