# Nix Solo vs QUS Tech

The clearest difference is update cadence: Nix Solo at every 10 days against QUS Tech's every 3 months. Nix Solo also leads on device support (4 vs 2) and iOS requirement (15.1 vs 17.0). On price, ads and in-app purchases there is nothing between them.

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

Nix Solo ships an update every 10 days, QUS Tech every 3 months. The most recent releases landed on September 26, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Nix Solo | QUS Tech |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (61 ratings)](https://appshunter.io/ios/app/nix-solo/id1632680170/reviews)** | — |
| Number of ratings | **61** | — |
| Positive reviews | 14.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 months |
| Monetization | Free | — |
| Size | 65 MB | 58 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nix, Inc.](https://appshunter.io/developer/1625732872) | [sanSirro GmbH](https://appshunter.io/developer/1462270226) |

## What reviewers say

### Nix Solo

[App page](https://appshunter.io/ios/app/nix-solo/id1632680170)

Monitor personal fluid and electrolyte losses in real-time during workouts. This app provides insights into sweat composition and hydration needs based on individual biology, using data from a companion biosensor.

**Highlights:** Real-time fluid and electrolyte loss monitoring, Personalized sweat composition insights, Correlates sweat data with environmental factors (Nix Index), Post-workout Sweat Intelligence reports, Integration with Apple Watch and Garmin devices, Workout type and hydration input

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

**In-app purchases:** none


### QUS Tech

[App page](https://appshunter.io/ios/app/qus-tech/id6745941500)

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

**In-app purchases:** none


## Frequently asked questions

### Is Nix Solo free?

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

### Is QUS Tech free?

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

### Do Nix Solo or QUS Tech have ads?

Neither Nix Solo nor QUS Tech shows ads.

### Which is updated more often, Nix Solo or QUS Tech?

Nix Solo ships an update every 10 days, and QUS Tech every 3 months. Most recently, Nix Solo was updated on September 26, 2026 and QUS Tech on September 9, 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.*