TCM Turbo vs DiagonalOBDII
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TCM Turbo
Access a database of cars available for tuning at TCM TURBO Romania. Browse all models and engine types for chip tuning services. Find distributors, current promotions, and contact the TCM Turbo team.
- Car tuning database
- Chip tuning information
- Distributor map
- Current promotions
- Portfolio with images
- Contact team
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Aplicația TCM Turbo vă permite accesul în baza de date cu mașinile ce se pot tuna la TCM TURBO România. Ultilizatorii pot naviga prin toate modelele și motorizările la care putem face chiptuning. În plus există și următoarele caracteristici: - hartă cu toți distribuitorii TCM Turbo de pe teritoriul României - secțiune de întrebări frecvente (FAQ) - secțiune cu promoțiile curente - secțiune de portofoliu cu imagini preluate de pe pagina de facebook TCM Turbo - posibilitatea de a contacta echipa TCM Turbo din oricare din orașele disponibile în harta aplicației.
DiagonalOBDII
This app helps mechanics streamline vehicle drive cycles by providing live tracking of emissions monitors and diagnostic trouble codes. It offers precise guidance on drive cycle parameters and instant explanations for trouble codes, ensuring accurate diagnostics and faster vehicle readiness for inspection.
- Live drive cycle monitoring
- Immediate DTC identification
- Real-time monitor completion verification
- Precise drive cycle parameter guidance
- Professional, easy-to-navigate dashboard
- Instant trouble code explanations
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Diagonal is designed specifically for mechanics who want to simplify and speed up vehicle drive cycles. Instantly track emissions monitors and diagnostic trouble codes (DTCs) live, ensuring accurate diagnostics and rapid vehicle readiness for inspection. Key Features: -Live Drive Cycle Monitoring: Clearly see the real-time status of emissions monitors as they run, complete, or require further action during your drive. -Immediate Diagnostics: Quickly identify and address active trouble codes (DTCs) as they appear, eliminating uncertainty during drive cycles. -Efficiency and Accuracy: Avoid unnecessary repeat drive cycles by verifying real-time monitor completion, ensuring vehicles pass inspection on the first try. -Precise Drive Cycle Guidance: Monitor essential drive cycle parameters such as speed, RPM, engine temperature, and throttle position to meet exact diagnostic requirements. -Professional Dashboard: Access all critical information quickly through a clear, easy-to-navigate interface tailored for automotive professionals. -Instant Code Explanations: Quickly interpret trouble codes with straightforward, mechanic-friendly explanations. Why Mechanics Trust Diagonal: -Saves Valuable Time: Complete diagnostic drive cycles accurately the first time. -Faster Inspections: Immediately identify vehicle readiness to streamline your workflow. -Reduces Diagnostic Uncertainty: Clear, actionable data presented in real-time. -Diagonal empowers professional technicians with the tools to perform diagnostics faster and more efficiently than ever before. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://diagonal-d070c.web.app/privacy.html
Screenshots
Verdict
The clearest difference is in-app purchases: TCM Turbo at none against DiagonalOBDII's 4. TCM Turbo also leads on iOS requirement (6.0 vs 18.1). DiagonalOBDII's advantage is update cadence (every 2 weeks vs every 4 months). On price, rating, ratings volume and ads 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
Both are free to download. DiagonalOBDII sells 4 in-app purchases, starting at $12.99 per month. TCM Turbo asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for TCM Turbo against 5.0 for DiagonalOBDII. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
TCM Turbo ships an update every 4 months, DiagonalOBDII every 2 weeks. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.
| Parameter | TCM Turbo | DiagonalOBDII |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 1 | 1 |
| Update frequency | Every 4 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 6.0 — better | 18.1 |
| Further details — not scored | ||
| Size | 3 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Skanbit Software Solutions | Kyle Louderback |
Customer experience
TCM Turbo
DiagonalOBDII
In-app purchases
TCM Turbo
No in-app purchases
DiagonalOBDII
- Diagonal Premium Monthly$12.991 Month
- Diagonal Premium Trial1 Month trial$12.991 Month
- Shop Owner - Monthly$17.991 Month
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- Diagonal Premium Yearly$99.991 Year
