# Fluid Running vs Zygo

The clearest difference is review sentiment: Fluid Running at 88% against Zygo's 43%. Fluid Running also leads on in-app purchases (none vs 2) and rating (4.7 vs 4.2). Zygo's advantage is update cadence (every 2 months vs every 10 months) and ratings volume (135 vs 18). On price and ads there is nothing between them.

Both are free to download. Zygo sells 2 in-app purchases, starting at $4.99 per month. Fluid Running asks for nothing beyond the download.

Fluid Running holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Zygo has 135 ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 88% of Fluid Running's written reviews are positive against 43% of Zygo's.

Fluid Running ships an update every 10 months, Zygo every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Fluid Running | Zygo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (18 ratings)](https://appshunter.io/ios/app/fluid-running/id1377251019/reviews)** | [4.2 (135 ratings)](https://appshunter.io/ios/app/zygo/id1564866603/reviews) |
| Number of ratings | 18 | **135** |
| Positive reviews | **87.5% of reviews** | 42.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 23 MB | 101 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Fluid Running, LLC](https://appshunter.io/developer/1377251018) | [Swimmersive Co](https://appshunter.io/developer/1381489863) |

## What reviewers say

### Fluid Running

[App page](https://appshunter.io/ios/app/fluid-running/id1377251019)

This app offers a unique approach to full-body fitness using water-based exercises. It provides guided movements and workout routines suitable for all fitness levels, from beginners to those seeking new challenges. Access class schedules and supplementary learning materials to enhance your aquatic training.

**Highlights:** Deep and shallow water workout movements, Guided deep water workouts, Guided shallow water workouts, Class schedules (Chicagoland), Downloadable workout routines, Technique tutorial videos

**Features:** macOS Compatibility

**In-app purchases:** none


### Zygo

[App page](https://appshunter.io/ios/app/zygo/id1564866603)

Access over 500 guided swim workouts paired with music. Track your progress with lap counting and a tempo trainer. Stay connected with walkie-talkie functionality and manage device settings.

**Highlights:** 500+ guided swim workouts, Music integration, Lap counting, Tempo trainer, Walkie-talkie feature, Battery level monitoring, Firmware updates

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Yearly Subscription | $49.99 | per year |


## Frequently asked questions

### Is Fluid Running free?

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

### Is Zygo free?

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

### Which has better reviews, Fluid Running or Zygo?

Fluid Running is rated higher. Fluid Running averages 4.7 out of 5 from 18 ratings, while Zygo averages 4.2 from 135 ratings.

### Do Fluid Running or Zygo have ads?

Neither Fluid Running nor Zygo shows ads.

### Which is updated more often, Fluid Running or Zygo?

Fluid Running ships an update every 10 months, and Zygo every 2 months. Most recently, Fluid Running was updated on October 24, 2026 and Zygo on October 24, 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.*