# GasSCAN vs TTsolar

The clearest difference is ratings volume: GasSCAN at 8 against TTsolar's 1. TTsolar's advantage is iOS requirement (13.0 vs 15.0). On price, rating, 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.

On the App Store both sit at effectively the same score — 4.9 for GasSCAN against 5.0 for TTsolar. That said, the two scores are not equally well evidenced: GasSCAN has 8 ratings behind it against 1, so its average is the more settled of the two.

GasSCAN ships an update every 4 months, TTsolar every 7 months. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | GasSCAN | TTsolar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (8 ratings)](https://appshunter.io/ios/app/gasscan/id1361183535/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ttsolar-cloud/id6755569814/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 517 MB | 67 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Magnolia River](https://appshunter.io/developer/691329552) | [建孟 罗](https://appshunter.io/developer/1846487648) |

## What reviewers say

### GasSCAN

[App page](https://appshunter.io/ios/app/gasscan/id1361183535)

Scan barcodes or QR codes that comply with ASTM F2897 standards. The app records scan data along with GPS location, allowing for easy export of scan lists in CSV format for GIS integration.

**Highlights:** ASTM F2897 barcode scanning, QR code scanning, GPS data logging, Scan history storage, CSV export, ArcGIS Online integration

**Features:** macOS Compatibility

**In-app purchases:** none


### TTsolar

[App page](https://appshunter.io/ios/app/ttsolar-cloud/id6755569814)

This platform is designed for users of the Jiamei Tianhe Yuan power station to manage and maintain their facilities. It provides a centralized system for operational oversight and upkeep.

**Highlights:** Power station maintenance, User platform, Facility management, Operational oversight, Upkeep system

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

**In-app purchases:** none


## Frequently asked questions

### Is GasSCAN free?

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

### Is TTsolar free?

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

### Which has better reviews, GasSCAN or TTsolar?

TTsolar is rated higher. GasSCAN averages 4.9 out of 5 from 8 ratings, while TTsolar averages 5.0 from 1 ratings.

### Do GasSCAN or TTsolar have ads?

Neither GasSCAN nor TTsolar shows ads.

### Which is updated more often, GasSCAN or TTsolar?

GasSCAN ships an update every 4 months, and TTsolar every 7 months. Most recently, GasSCAN was updated on October 7, 2026 and TTsolar on October 1, 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.*