Comparison

TPMSII vs OBD2 Scanner ELM327

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

Head to head
About

TPMSII

Monitor your car's tire pressure and temperature in real-time using your smartphone. Receive timely alerts for abnormal conditions to ensure safer driving. Requires Bluetooth 4.0 and a compatible sensor.

Highlights
  • Real-time tire pressure monitoring
  • Real-time tire temperature monitoring
  • Bluetooth sensor integration
  • Abnormal data alerts
  • Background monitoring
Features
Read full description

"TMPSII" is a car tire pressure detection system application software designed for smartphones. It is suitable for smartphones with Bluetooth 4.0 version. It cooperates with the Bluetooth sensor installed on the car to receive the pressure, temperature, and air leakage of the four tires. The tire pressure and temperature data are monitored in real time when the car is driving. When the data is abnormal, the "smart tire pressure" can be alerted in time to ensure driving safety. 【Precautions】 1. Please make sure that Bluetooth is turned on normally so that "Smart Tire Pressure" can be used normally. 2. The background voice will continue to monitor sudden tire conditions in the background. When switching to the background broadcast, it will consume more power than other operations.

About

OBD2 Scanner ELM327

This app provides comprehensive OBD scanning for vehicles, allowing users to read and clear fault codes from various ECUs, monitor live sensor data, and perform special functions like DPF regeneration and injector coding. It supports over 100 vehicle makes and offers detailed reports and diagnostic assistance.

Highlights
  • Read and delete fault codes from any ECU
  • Monitor over 200 live sensor data points
  • Perform special OBD functions
  • Generate shareable PDF diagnostic reports
  • Check SMOG status for emission tests
  • Reset service/oil lights
  • Track 0-60 and 0-100 timing
Features
Read full description

GaragePro is the perfect OBD Scanning app for automotive enthusiasts, repair shops, and DIYers. Covering 100+ vehicle makes, GaragePro offers you comprehensive OBD coverage such as reading fault codes from all ECUs- Engine, Airbag, ABS, BCM etc., as well as Special functions such as Injector coding, DPF regeneration, Throttle Reset, ABS (Brake) bleeding, Steering angle reset etc. Key Features: OBD2 Scanning: Read and delete fault codes from any module- Engine, ABS, SRS, EPS, BCM and more. GaragePro can read OBD codes from 100s of ECUs across different makes, covering 100,000+ unique DTCs. Live Data Monitoring: Read over 200 live data points from vehicle sensors in real-time, including RPM, speed, coolant temperature, fuel trim etc. as well as vehicle specific live sensor data points. GaragePro OBD2 Scanner also has intuitive graphs and customizable displays, that let your visualize changes in your OBD2 data. You can also export PID readings to Excel or PDF for detailed analyses. Multi-Mode Coverage: Unlock more OBD2 modes than other apps. GaragePro offers access to a plethora of modes/service IDs such as modes 01, 02, 03, 04, 06, 07, 09, 0A, as well as vehicle specific modes for enhanced OBD coverage. Special OBD functions like Injector coding, DPF regeneration, Throttle Reset, ABS (Brake) bleeding, Steering angle reset, Power balance, Fuel Density Reset, Learning Value Reset, Actuation Tests, AC Control Module Reset, Indicator light reset, Brake Pedal Position Sensor learning, Light and Door customizations, etc. Check the app for the full list applicable to your car. PDF report and Support: Get a shareable PDF with code descriptions when scanning a vehicle and share it with your technicians, friends, customers or store it for future comparisons. GaragePro also offers email and chat support to its customers. Smog checks through OBD: Be ready for your vehicle's emission tests by checking SMOG status in the app. Service/Oil reset: GaragePro OBD2 Scanner includes both- Auto and manual methods to reset the Service/Oil lights. Check Engine Light/Dashboard Lights Assistance: Compared to other apps, GaragePro is able to cover not just MIL, but also ABS, airbag, oil level, steering and other warning lights. OBD Freeze Frame data: Read OBD freeze frame data to understand your sensors' state when OBD codes were generated. Track mode: Measure your 0-60, 0-100 timing and see how well you do on the track. Vehicle Compatibility: The GaragePro OBD2 Scanner app works with any vehicle that's compliant with the OBD2 standard (introduced in the USA in 1996). It reads data from 100s of ECUs in cars & bikes, including Engine, ABS, Airbags (SRS), EPS, BCM, Traction Control, Transmission, HVAC, Instrument cluster & more. It is compatible with all American, Japanese, Korean, German, and other European car & bike makes, including but not limited to GM, Toyota, Ford, Lincoln, Buick, Chevrolet , Opel, Nissan, Infinity, Renault, Mercedes, Suzuki, Lexus, Triumph, Hyundai, Kia, Mazda, Honda, Mahindra, Tata, MG, Volkswagen, Audi, Skoda, Seat, BMW and more. For motorcycles, you will need a connecting cable that connects the 16-pin OBD scanner with the bike's OBD port. Bike diagnostics include DTC reading & deletion, live data stream & freeze frame data. OBD Scanner Compatibility: GaragePro OBD2 Scanner works with any Bluetooth OBD Scanner, including most elm327 based OBD scanners. It also works with popular OBD scanners like Vlink, OBDLink, Carista, Veepeak, Viecar, Kiwi and more. GaragePro also has its own OBD2 Scanner that works seamlessly with the app. Please note: The availability of sensor data depends on your vehicle's ECUs. The app can only display information that is provided by your car's systems. Whether you're a car enthusiast seeking performance gains, a mechanic looking to tackle repairs, or a car owner committed to staying informed, GaragePro OBD2 Scanner is the perfect OBD2 diagnostic tool for you. Email support: fix@carpm.in

Screenshots

TPMSII1 screens
OBD2 Scanner ELM3274 screens

Verdict

The call

The clearest difference is rating: OBD2 Scanner ELM327 at 4.3 against TPMSII's 3.7. OBD2 Scanner ELM327 also leads on update cadence (every 3 weeks vs every 2 months) and review sentiment (46% vs 35%). TPMSII's advantage is in-app purchases (none vs 24) and iOS requirement (9.0 vs 12.0). On price, 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. OBD2 Scanner ELM327 sells 23 in-app purchases, starting at $4.99 per year. TPMSII asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OBD2 Scanner ELM327 holds the better App Store score, 4.3 against 3.7. Both are backed by a comparable volume of ratings — 6 and 19 respectively. Written reviews point the same way: 35% of TPMSII's written reviews are positive against 46% of OBD2 Scanner ELM327's.

UpkeepUpdate frequency

TPMSII ships an update every 2 months, OBD2 Scanner ELM327 every 3 weeks. The most recent releases landed on June 11, 2026 and September 16, 2026 respectively.

Scorecard7 real differences · 3 level
TPMSII versus OBD2 Scanner ELM327: the parameters behind the verdict, then further details
ParameterTPMSIIOBD2 Scanner ELM327
PriceFreeFree
Rating3.7 (6 ratings)4.3 (19 ratings) — better
Positive reviews35.3% of reviews46.2% of reviews — better
Number of ratings619 — better
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS9.0 — better12.0
Further details — not scored
Size124 MB65 MB
Age rating4+4+
DeveloperShenzhen Chaoyue Technology Development Co.,LtdZymbia Interactive Technologies Private Limited

Customer experience

TPMSII

All ratings6 ratings
Positive50.0%
Neutral33.3%
Negative16.7%
Written reviews68 reviews
Positive35.3%
Neutral19.1%
Negative45.6%

OBD2 Scanner ELM327

All ratings19 ratings
Positive78.9%
Neutral5.3%
Negative15.8%
Written reviews65 reviews
Positive46.2%
Neutral3.1%
Negative50.8%

Bugs and requests

TPMSII

Not enough reviews yet to summarise bugs or requests.

OBD2 Scanner ELM327

Reported bugs

21 issues
  • App stops working
  • App does not load past splash screen
  • App is not responding properly
  • App crashes when trying to buy subscription
  • App starts crashing after a few days
Show 16 more
  • License removed after uninstall/reinstall
  • App does not start after downloading
  • Shows false error codes
  • Requires uninstall to connect
  • App closes and won't open
  • Cannot clear codes after paying for subscription
  • Scanning issue (stops at 4%)
  • App hangs at 5% during scan
  • Freezes or gives an error during scan
  • Most GM PIDs not available
  • Live View Advanced PIDs missing
  • Cannot pull or clear codes
  • Not functional after updates
  • Cannot link to iPhone
  • Not working on multiple car models
  • Service reset states not available after payment

Requested features

8 requests
  • DPF REGEN feature
  • Ability to select new vehicle easily
  • Reactivate perpetual license without reinstalling
  • List of approved scanner devices
  • Support for WiFi adapters on iOS
Show 3 more
  • Add Google ID option for iPhone
  • Fix PIDs missing in Live View Advanced
  • Option to store data locally instead of server

In-app purchases

None

TPMSII

No in-app purchases

23 purchases

OBD2 Scanner ELM327

Subscriptions11
  • AI Scan Summary (Yearly)$4.991 Year
  • Standard - Yearly$9.491 Year
  • Personal Plan$9.991 Year
Show 8 more
  • Lite - Yearly$9.991 Year
  • Standard - Yearly$19.991 Year
  • Advanced - Yearly$23.991 Year
  • Advanced + AI Summary - Yearly$28.991 Year
  • Premium - Yearly$32.991 Year
  • Standard - Yearly$34.991 Year
  • Advanced - Yearly$71.991 Year
  • Advanced - Yearly$99.991 Year
One-time12
  • Lite - Perpetual$17.99
  • Lite - Perpetual$21.99
  • Standard - Perpetual$34.99
Show 9 more
  • Standard - Perpetual$37.99
  • Standard - Perpetual$54.99
  • Lifetime Subsciption$69.99
  • Standard - Perpetual$69.99
  • Advanced - Perpetual2 variants$99.99
  • Advanced - Perpetual$109.99
  • Advanced - Perpetual$129.99
  • Advanced - Perpetual$159.99
  • Advanced - Perpetual$199.99

Questions

Is TPMSII free?
TPMSII is free to download, with no in-app purchases.
Is OBD2 Scanner ELM327 free?
OBD2 Scanner ELM327 is free to download, with in-app purchases available.
Which has better reviews, TPMSII or OBD2 Scanner ELM327?
OBD2 Scanner ELM327 is rated higher. TPMSII averages 3.7 out of 5 from 6 ratings, while OBD2 Scanner ELM327 averages 4.3 from 19 ratings.
Do TPMSII or OBD2 Scanner ELM327 have ads?
Neither TPMSII nor OBD2 Scanner ELM327 shows ads.
Which is updated more often, TPMSII or OBD2 Scanner ELM327?
TPMSII ships an update every 2 months, and OBD2 Scanner ELM327 every 3 weeks. Most recently, TPMSII was updated on June 11, 2026 and OBD2 Scanner ELM327 on September 16, 2026.

Other comparisons