Comparison

ThinkDiag+ vs UpaSmartHome

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

UpaSmartHome

Features
Read full description

UpaSmartHome puts your whole smart home in one place — monitor sensors, control relays, and manage schedules right from your iPhone. FEATURES • Sensors — live temperature, humidity, and battery readings from every room, with thermostat set-points you can adjust in real time. • Relays — control lights, sockets, pumps, and multi-channel switch modules individually, organized by room or module. • Schedules — set start/end times for heaters, boilers, garden lights, and anything else wired through your relays. • Alarm Sensors — water-leak, contact, occupancy, and vibration sensors, with real-time alerts the moment something's triggered. • Notifications — a full activity log of system updates, security alerts, and low-battery warnings, with push notifications so you know immediately, even when the app is closed. • Works with your own server — pair with your existing self-hosted smart-home hub over its own serial number and OTP; no cloud account required beyond your own. UpaSmartHome is built for Zigbee2MQTT-based smart-home hubs running the UpaSmartHome/SmartHome backend, giving you full, real-time control of your system from your iPhone.

Screenshots

ThinkDiag+4 screens
UpaSmartHome4 screens

Verdict

The call

The clearest difference is update cadence: UpaSmartHome at fortnightly against ThinkDiag+'s monthly. ThinkDiag+'s advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ThinkDiag+ ships an update monthly, UpaSmartHome fortnightly. The most recent releases landed on November 3, 2026 and October 26, 2026 respectively.

Scorecard3 real differences · 7 level
ThinkDiag+ versus UpaSmartHome: the parameters behind the verdict, then further details
ParameterThinkDiag+UpaSmartHome
PriceFreeFree
Rating4.5 (4.4K ratings) — better—
Positive reviews73.8% of reviews—
Number of ratings4.4K — better—
Update frequencyMonthlyFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better17.0
Further details — not scored
Size543 MB3 MB
Age rating17+4+
DeveloperTHINKCAR INC2, PAVELS URBANOVICS

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

UpaSmartHome

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ThinkDiag+

No in-app purchases

None

UpaSmartHome

No in-app purchases

Questions

Is ThinkDiag+ free?
ThinkDiag+ is free to download, with no in-app purchases.
Is UpaSmartHome free?
UpaSmartHome is free to download, with no in-app purchases.
Do ThinkDiag+ or UpaSmartHome have ads?
Neither ThinkDiag+ nor UpaSmartHome shows ads.
Which is updated more often, ThinkDiag+ or UpaSmartHome?
ThinkDiag+ ships an update monthly, and UpaSmartHome fortnightly. Most recently, ThinkDiag+ was updated on November 3, 2026 and UpaSmartHome on October 26, 2026.

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