# Tech vs Size Stream Mobile Fit

The clearest difference is rating: Size Stream Mobile Fit at 2.8 against Tech's 1.6. Size Stream Mobile Fit also leads on review sentiment (25% vs 13%). Tech's advantage is update cadence (monthly vs every 13 months) and ratings volume (83 vs 5). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Size Stream Mobile Fit holds the better App Store score, 2.8 against 1.6. That said, the two scores are not equally well evidenced: Tech has 83 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 13% of Tech's written reviews are positive against 25% of Size Stream Mobile Fit's.

Tech ships an update monthly, Size Stream Mobile Fit every 13 months. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Tech | Size Stream Mobile Fit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (83 ratings)](https://appshunter.io/ios/app/tech-air-app/id1504440133/reviews) | **[2.8 (5 ratings)](https://appshunter.io/ios/app/size-stream-mobile-fit/id1585425901/reviews)** |
| Number of ratings | **83** | 5 |
| Positive reviews | 13.1% of reviews | **25.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 13 months |
| Monetization | Free | Free |
| Size | 151 MB | 217 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [ALPINESTARS SPA](https://appshunter.io/developer/1499986821) | [Size Stream LLC](https://appshunter.io/developer/1008166455) |

## What reviewers say

### Tech

[App page](https://appshunter.io/ios/app/tech-air-app/id1504440133)

Easily register and monitor your motorcycle airbag system's status and battery life. Track ride details, record location and speed, and relive your journeys with detailed maps and statistics. Build a library of your rides and manage system settings.

**Highlights:** Register Tech-Air® 5 Airbag System, Monitor system status and battery life, Track ride details with location and speed, Record and visualize ride statistics, Build a library of recorded rides, Disable system for off-road riding, Update system firmware

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- ✅ Successful firmware updates when working properly
- 📍 Ride tracking and route recording functionality
- 🔋 Battery level monitoring
- ⚡ Quick pairing when conditions are optimal
- 🎯 Simple and intuitive UI design

**What reviewers complain about**

- 🐛 Constant disconnection issues between app and vest
- 📡 Extremely limited Bluetooth range (requires phone within 5cm of vest)
- 🔐 Registration and verification SMS not received in multiple regions
- ❌ Firmware update failures stuck at 2-3%
- ⚠️ App crashes on startup after updates

**Reported bugs**

- App crashes immediately upon launch after updates
- Firmware update stuck at 2% indefinitely
- Error 12 during firmware installation
- Verification SMS not arriving (especially for +420 Czech numbers and other regions)
- QR code scanner not recognizing codes

**Requested features**

- PC/desktop application for firmware updates
- Lean angle tracking and display
- Maximum speed recording in ride logs
- Acceleration metrics in ride data
- Altitude data in ride tracking


### Size Stream Mobile Fit

[App page](https://appshunter.io/ios/app/size-stream-mobile-fit/id1585425901)

This app offers a convenient and secure way to measure employees and receive size recommendations remotely. It simplifies the process of outfitting an organization with a portable body scanning solution that integrates with a dedicated data portal.

**Highlights:** Remote employee scanning, Immediate size recommendations, Integrated sizing logic, Customizable branding, Secure on-device processing, Dedicated data portal access

**In-app purchases:** none


## Frequently asked questions

### Is Tech free?

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

### Is Size Stream Mobile Fit free?

Size Stream Mobile Fit is free to download, with no in-app purchases.

### Which has better reviews, Tech or Size Stream Mobile Fit?

Size Stream Mobile Fit is rated higher. Tech averages 1.6 out of 5 from 83 ratings, while Size Stream Mobile Fit averages 2.8 from 5 ratings.

### Do Tech or Size Stream Mobile Fit have ads?

Neither Tech nor Size Stream Mobile Fit shows ads.

### Which is updated more often, Tech or Size Stream Mobile Fit?

Tech ships an update monthly, and Size Stream Mobile Fit every 13 months. Most recently, Tech was updated on October 12, 2026 and Size Stream Mobile Fit on October 13, 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.*