Comparison

ThinkDiag+ vs Flat Rate Tech Log

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ThinkDiag+

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
Read full description

1. Profession functions refer to OE level functions, such as read/clear code, data flow diagram, read ECU, drive test, bidirectional special functions, etc. 2. Support full-function OBD II diagnosis, read data flow, freeze frame read IM/real-time data, read/clear fault code, vehicle on-board monitoring/computer system control operation and read vehicle information. 3. Support vehicle maintenance light return to normal. 4. Select any vehicle diagnostic software, covering up to 39 major automobile manufacturers. 5. Support automatic VIN reading and one-key diagnosis. 6. Clear interpretation of fault codes and generate professional diagnostic reports. 7. Be able to communicate with other users within the ThinkDiag community (share/help/support). Not only for "ThinkDiag" and "ThinkDiag 2" device, but also works for "ThinkDiag Mini", "ThinkDirver", and "Thinkcar Pro" devices. ThinkDiag, an innovative vehicle diagnostic tool, is specially designed for repair technicians, small and medium-sized repair shops, and DIYers, to achieve the original manufacturer level diagnostic performance. It supports more than 100 vehicle brands of diagnostic services, including 15 special maintenance reset functions. ThinkDiag is as good as those comprehensive diagnostic equipment costed thousands of dollars. ThinkDiag is also an intelligent diagnostic device. Connecting with smartphone via Bluetooth, it is controlled to work by app. In the app, there is a diagnostic software store, and users can subscribe for diagnostic software according to their needs. ***Contact Us W: www.mythinkcar.com E: service@mythinkcar.com P: +1 833-692-2766 2151 S Haven Ave Unit 203 Ontario CA 91761 USA

About

Flat Rate Tech Log

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
Read full description

Your shop's system tracks hours for the dealer. Flat Rate Tech Log tracks them for YOU. Every flat rate technician knows the feeling: payday comes, the check looks short, and you have no way to prove it. A missed diag, a warranty line that never got flagged, a comeback that ate your time. Those hours add up to real money. Flat Rate Tech Log gives you your own accurate record of every repair order and every flagged hour, so you can check your paycheck with confidence. KNOW WHAT YOU EARNED - See your flagged hours for the current pay period at a glance - Set your hourly rate and see your estimated earnings - Weekly, biweekly, semimonthly, or monthly pay periods - Compare your totals against your pay stub before it's too late to dispute - Get reminders before each pay period closes LOG FAST, RIGHT FROM THE BAY - Log a repair order in seconds - Add multiple work items to the same RO - Track diagnostic and repair hours separately - Save job templates for the work you do most - Scan VIN numbers with your camera - Attach photos to each repair order - Check your hours and earnings from Home Screen widgets PROOF WHEN YOU NEED IT - Reports by week, pay period, or any custom date range - Export professional PDF reports of your flagged hours - Closed repair orders are locked in read-only mode for reliable records - Your data syncs securely across your devices with iCloud Built by someone who has worked in the dealership world, for technicians who want to protect every hour they earn. SUBSCRIPTION Flat Rate Tech Log offers Monthly Access and Yearly Access as auto-renewable subscriptions. Yearly Access includes a 1-week free trial for new subscribers. Payment will be charged to your Apple Account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours before the end of the current period. You can manage and cancel your subscriptions in your App Store account settings. Terms of Use (EULA): https://cesaribarra.net/terms-of-use-end-user-license-agreement/ Privacy Policy: https://cesaribarra.net/privacy-policy/

Screenshots

ThinkDiag+4 screens
Flat Rate Tech Log4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard6 real differences · 4 level
ThinkDiag+ versus Flat Rate Tech Log: the parameters behind the verdict, then further details
ParameterThinkDiag+Flat Rate Tech Log
PriceFreeFree
Rating4.5 (4.4K ratings) — better3.5 (2 ratings)
Positive reviews73.8% of reviews — better50.0% of reviews
Number of ratings4.4K — better2
Update frequencyMonthlyMonthly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.6
Further details — not scored
Size543 MB8 MB
Age rating17+4+
DeveloperTHINKCAR INCCesar Ibarra

Customer experience

ThinkDiag+

All ratings4,414 ratings
Positive88.1%
Neutral2.7%
Negative9.3%
Written reviews282 reviews
Positive73.8%
Neutral2.5%
Negative23.8%

Flat Rate Tech Log

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

Bugs and requests

ThinkDiag+

Reported bugs

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

Requested features

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

Flat Rate Tech Log

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ThinkDiag+

No in-app purchases

3 purchases

Flat Rate Tech Log

Subscriptions3
  • Weekly Access$1.997 Days
  • Monthly Access$4.991 Month
  • Yearly Access7 Days trial$39.991 Year

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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