# ThinkDiag+ vs Dollarfix

The clearest difference is monetization model: Dollarfix at free against ThinkDiag+'s free with in-app purchases. Dollarfix also leads on review sentiment (90% vs 74%) and rating (4.7 vs 4.5). ThinkDiag+'s advantage is ratings volume (4.3K vs 57). On price, update cadence, 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.

Dollarfix holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: ThinkDiag+ has 4.3K ratings behind it against 57, so its average is the more settled of the two. Written reviews point the same way: 74% of ThinkDiag+'s written reviews are positive against 90% of Dollarfix's.

Both ship on a similar rhythm, roughly every 3 weeks. Both last shipped on September 22, 2026.

## The numbers

| Metric | ThinkDiag+ | Dollarfix |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (4.3K ratings)](https://appshunter.io/ios/app/thinkdiag-plus/id1483420979/reviews) | **[4.7 (57 ratings)](https://appshunter.io/ios/app/dollarfix/id6739483382/reviews)** |
| Number of ratings | **4.3K** | 57 |
| Positive reviews | 73.6% of reviews | **90.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 539 MB | 888 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [THINKCAR INC](https://appshunter.io/developer/1464847379) | [MATL TECH INC.](https://appshunter.io/developer/1735263917) |

## What reviewers say

### ThinkDiag+

[App page](https://appshunter.io/ios/app/thinkdiag-plus/id1483420979)

This app provides professional-level vehicle diagnostics, offering features like reading/clearing fault codes, data flow analysis, and special maintenance functions. It supports a wide range of car brands and allows users to subscribe to specific diagnostic software. Connects via Bluetooth to your smartphone for intelligent vehicle analysis.

**Highlights:** OE-level diagnostic functions, Full OBD II diagnosis, Special maintenance functions, Supports 100+ vehicle brands, Automatic VIN reading, Professional diagnostic reports, In-app user community

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 🚀 Powerful diagnostic capabilities
- 🚀 Affordable price
- 🚀 Helpful customer support
- 🚀 Versatile for DIY and professionals

**What reviewers complain about**

- 🐛 Occasional crashes or freezes
- 🐛 Compatibility issues with certain vehicles
- 🔒 Concerns about annual subscription fees
- 🔒 Limited functionality on iOS devices

**Reported bugs**

- Failure to recognize VIN or vehicle information
- Inability to clear certain error codes
- Inconsistent performance across different devices

**Requested features**

- Improved user interface and navigation
- More detailed troubleshooting guides
- Expanded vehicle coverage and special functions
- Offline mode for diagnostics


### Dollarfix

[App page](https://appshunter.io/ios/app/dollarfix/id6739483382)

A social platform for car enthusiasts to share content, join communities, and get expert advice. It also offers vehicle diagnostic services, connecting to devices for OBD functions and maintenance checks.

**Highlights:** Automotive content sharing and discussion, Create and join car communities, Real-time car news and updates, Connect with car experts, Software diagnostic function, OBD functions and vehicle maintenance

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

**In-app purchases:** none


## Frequently asked questions

### Is ThinkDiag+ free?

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

### Is Dollarfix free?

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

### Which has better reviews, ThinkDiag+ or Dollarfix?

Dollarfix is rated higher. ThinkDiag+ averages 4.5 out of 5 from 4.3K ratings, while Dollarfix averages 4.7 from 57 ratings.

### Do ThinkDiag+ or Dollarfix have ads?

Neither ThinkDiag+ nor Dollarfix shows ads.

### Which is updated more often, ThinkDiag+ or Dollarfix?

ThinkDiag+ ships an update every 3 weeks, and Dollarfix every 3 weeks. Most recently, ThinkDiag+ was updated on September 22, 2026 and Dollarfix on September 22, 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.*