# ThinkDiag+ vs Flat Rate Tech Log

The clearest difference is rating: ThinkDiag+ at 4.5 against Flat Rate Tech Log's 3.5. ThinkDiag+ also leads on in-app purchases (none vs 3) and ratings volume (4.4K vs 2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Flat Rate Tech Log sells 3 in-app purchases, starting at $1.99 per 7 days. ThinkDiag+ asks for nothing beyond the download.

ThinkDiag+ holds the better App Store score, 4.5 against 3.5. That said, the two scores are not equally well evidenced: ThinkDiag+ has 4.4K ratings behind it against 2, 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 50% of Flat Rate Tech Log's.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on November 10, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ThinkDiag+ | Flat Rate Tech Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (4.4K ratings)](https://appshunter.io/ios/app/thinkdiag-plus/id1483420979/reviews)** | [3.5 (2 ratings)](https://appshunter.io/ios/app/flat-rate-tech-log-flag-hours/id6760527094/reviews) |
| Number of ratings | **4.4K** | 2 |
| Positive reviews | **73.8% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 543 MB | 8 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [THINKCAR INC](https://appshunter.io/developer/1464847379) | [Cesar Ibarra](https://appshunter.io/developer/1076131150) |

## 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


### Flat Rate Tech Log

[App page](https://appshunter.io/ios/app/flat-rate-tech-log-flag-hours/id6760527094)

This app helps automotive technicians efficiently track repair orders, log work items, and scan VINs. It allows attaching photos, viewing activity summaries, and generating professional PDF reports for flagged hours. Designed for shop workflow, it organizes job details without paper notes.

**Highlights:** Track repair orders, Log work items, Scan VIN numbers, Attach photos to orders, Generate PDF reports, View activity summaries

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $1.99 | per 7 days |
| Monthly Access | $4.99 | per month |
| Yearly Access | $39.99 | per year |


## Frequently asked questions

### Is ThinkDiag+ free?

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

### Is Flat Rate Tech Log free?

Flat Rate Tech Log is free to download, with in-app purchases available.

### Which has better reviews, ThinkDiag+ or Flat Rate Tech Log?

ThinkDiag+ is rated higher. ThinkDiag+ averages 4.5 out of 5 from 4.4K ratings, while Flat Rate Tech Log averages 3.5 from 2 ratings.

### Do ThinkDiag+ or Flat Rate Tech Log have ads?

Neither ThinkDiag+ nor Flat Rate Tech Log shows ads.

### Which is updated more often, ThinkDiag+ or Flat Rate Tech Log?

ThinkDiag+ ships an update monthly, and Flat Rate Tech Log monthly. Most recently, ThinkDiag+ was updated on November 10, 2026 and Flat Rate Tech Log on October 31, 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.*