# Sigma vs PlusOne

The clearest difference is rating: PlusOne at 5.0 against Sigma's 4.4. Sigma's advantage is ratings volume (54 vs 3) and iOS requirement (14.0 vs 16.4). On price, review sentiment, 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.

PlusOne holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Sigma has 54 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 87% of Sigma's written reviews are positive against 80% of PlusOne's, so the app with the better star average is not the one people write more warmly about.

Sigma ships an update weekly, PlusOne every 5 days. The most recent releases landed on October 20, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Sigma | PlusOne |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (54 ratings)](https://appshunter.io/ios/app/sigma-ai/id6743433033/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/plusone-workout-plan-and-log/id6756535485/reviews)** |
| Number of ratings | **54** | 3 |
| Positive reviews | **86.8% of reviews** | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Monetization | Free | Free |
| Size | 231 MB | 165 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [Chaoshi Technology (Shanghai) Co., Ltd.](https://appshunter.io/developer/1520053656) | [伟 刘](https://appshunter.io/developer/1803985327) |

## What reviewers say

### 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


### PlusOne

[App page](https://appshunter.io/ios/app/plusone-workout-plan-and-log/id6756535485)

This app offers personalized AI-driven fitness plans and 24/7 digital coaching. It provides intelligent feedback, tracks progress with detailed statistics, and adapts training cycles for continuous improvement. Optimized algorithms cater to specific needs, including women's fitness.

**Highlights:** AI-generated personalized training plans, 24/7 digital coaching and guidance, Intelligent post-workout feedback and analysis, Automated training cycle progression, Women's fitness optimized algorithms, Training calendar and progress tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is Sigma free?

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

### Is PlusOne free?

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

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

PlusOne is rated higher. Sigma averages 4.4 out of 5 from 54 ratings, while PlusOne averages 5.0 from 3 ratings.

### Do Sigma or PlusOne have ads?

Neither Sigma nor PlusOne shows ads.

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

Sigma ships an update weekly, and PlusOne every 5 days. Most recently, Sigma was updated on October 20, 2026 and PlusOne on October 14, 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.*