Nix Solo vs QUS Tech
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Nix Solo
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.
- 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
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To train at your peak, you can’t just train hard. You need to train in a way that’s informed by your personal biology. The Nix Solo app allows users to monitor their own personal fluid and electrolyte losses in real time during a workout using the Nix Hydration Biosensor. This companion app provides valuable insight into their unique sweat composition and individual hydration needs based on their personal biology. At Nix, we built the first biosensor to analyze sweat and provide endurance athletes with personal hydration data – scientifically validated, and delivered in real time. Once paired with the Nix Hydration Biosensor, you are on your way to understanding your hydration needs with Nix Solo, our individual monitoring app. We’re the first hydration biosensor of its kind — the only pod, patch, and free app combination to: - Evaluate the electrochemical biomarkers in your sweat - Send real-time updates to your phone, Apple Watch, Garmin Watch, or Garmin Bike Computer - Correlate your sweat data and your training environment with the Nix Index – a composite index of six environmental factors: temperature, humidity, dew point, altitude, wind speed, and solar load - Provide post workout Sweat Intelligence via insights on your Sweat Profile including fluid loss rate, electrolyte loss rate and sweat composition metrics Before your workout, tell the Nix Solo app what type of workout you’re doing and what you’ll be hydrating with. You can also consult the Nix Index to see how your environment impacts your hydration needs. Once you start sweating, our single-use patch begins measuring and analyzing your fluid and electrolyte losses minute by minute- metrics that represent your unique “sweat composition.” This data is instantly streamed to our app, and can also be shared with devices like your Apple Watch, Garmin Watch, and Garmin bike computer. The result is knowing when, what, and how much to drink in real time to enhance both safety and performance.
QUS Tech
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QUS Tech is your mobile companion to the QUS BODY CONNECTED system – a cutting-edge smart textile solution that captures vital and movement data in real time. Designed for professionals in sports, research, and safety-critical industries, the app enables seamless access to biometric and geolocation insights, powered by integrated textile sensors and advanced cloud analytics. Key Features: - Live Data Monitoring – View ECG, heart rate, breathing rate, calories burned, and more in real time - Location & Movement Tracking – Monitor GPS data, movement intensity, and positioning - Session Management – Start, stop, and review measurement sessions directly from your mobile device - Data Sync & Secure Storage – Your data is securely stored and synced with the QUS Data Platform - Cross-Platform Integration – Designed to work hand-in-hand with our web dashboard for deeper analytics - B2B-Ready – Ideal for teams, coaches, researchers, and industrial safety managers Built for: - Athletes & Coaches – Get performance insights on the go - Research Professionals – High-resolution vital tracking - Workplace Safety – Monitor biometric strain in real-time - B2B / B2G Use Cases – Supports integrations in complex organizational settings Requirements: To use this app, you need a QUS BODY CONNECTED smart textile and a registered user account on the QUS Data Platform. Learn more and request a demo: qus.tech
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Nix Solo | QUS Tech |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (61 ratings) — better | — |
| Positive reviews | 14.3% of reviews | — |
| Number of ratings | 61 — better | — |
| Update frequency | Every 10 days — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 65 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | Nix, Inc. | sanSirro GmbH |
In-app purchases
Nix Solo
No in-app purchases
QUS Tech
No in-app purchases









