Gretio vs MaxiAP Diag
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gretio
This app allows advanced vehicle diagnostics and service functions for diesel, gas, electric, and hybrid cars. It analyzes thousands of data points, looks up trouble codes across all modules, and performs service regenerations and tests. Designed for DIY users, it requires specific hardware and vehicle compatibility.
- Advanced vehicle diagnostics
- Analyze thousands of data points
- Diagnostic trouble code lookup
- Perform service functions (DPF regen, SCR tests)
- Program vehicle features
- Supports diesel, gas, electric, hybrid vehicles
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Use Gretio with an OBDLINK MX+ to perform advanced diagnostic functions on your diesel, gas, electric, or hybrid vehicle. Analyze thousands of different data points at high speeds. Look up diagnostic trouble codes for all modules including the Engine Control Module, Chassis Control Module, Drive Motor Control Modules, Battery Energy Control modules, Body Control Module, Radio, and many more. Perform advanced service functions such as diesel particulate filter service regenerations, selective catalytic reduction tests, power relay tests, and even program some features. Gretio is an advanced tool made for the DIY market. All procedures must be used in accordance with the vehicle's service manual or other approved literature by your vehicle manufacturer. Gretio only functions on certain makes and models. Visit our website at https://surrealdev.com/gretio/ to see a list of known supported vehicles.
MaxiAP Diag
This management app helps DIY vehicle owners with repairs, maintenance, and customization. It offers diagnostic insights, common dashboard light explanations, and service functions for various car models. Monitor your vehicle's health and access repair shop information.
- Enhanced system diagnostics
- OBDII test (read/erase codes, live data)
- Auto VIN vehicle identification
- Vehicle health monitoring
- DIY service functions (oil reset, TPMS)
- EV/Hybrid battery testing
- Common dashboard light guide
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MaxiAP Diag is a management application designed to meet the simple repair, maintenance, and customization needs of DIY vehicle owners. As a next-generation DIY diagnostic tool, it is dedicated to providing C-end users with insights into vehicle conditions and diagnostic recommendations. Additionally, features such as common dashboard lights, Technical Service Bulletins (TSBs), and 100km acceleration test have been added based on personalized customer demands, further enhancing user understanding of the vehicle's condition. 1. Comprehensive support for enhanced system diagnostics of internationally recognized car models. 2. Provides OBDII test, including the ability to read and erase codes, emissions results, view freeze frame and live data. 3. Supports late model vehicles using faster CANFD communications. 4. Quick vehicle identification with Auto VIN. Store and quickly access past records, and diagnostic reports. 5. Complete monitoring of vehicle health, including engine oil life, average fuel consumption, and brake pad life. 6. Supports commonly performed DIY service functions, such as oil reset, TPMS relearn, battery registration, and wipers replacement. 7. Test hybrid and electric vehicle power battery. Assess battery State of Charge (SoC), State of Health (SoH), and recharge mileage. Provides battery maintenance reminders. 8. Provides additional features tailored to the needs of DIY users, such as Find a Local Repair Shop function and Common Dashboard Lights, etc.
Screenshots
Verdict
The clearest difference is review sentiment: Gretio at 68% against MaxiAP Diag's 0%. Gretio also leads on rating (3.8 vs 2.9) and update cadence (monthly vs every 5 months). MaxiAP Diag's advantage is iOS requirement (13.0 vs 18.0). On price, ratings volume, 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
Both are free to download. Gretio sells 4 in-app purchases, starting at $19.99 per year and MaxiAP Diag sells 28 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Gretio holds the better App Store score, 3.8 against 2.9. Both are backed by a comparable volume of ratings — 23 and 10 respectively. Written reviews point the same way: 68% of Gretio's written reviews are positive against 0% of MaxiAP Diag's.
Gretio ships an update monthly, MaxiAP Diag every 5 months. The most recent releases landed on October 29, 2026 and October 20, 2026 respectively.
| Parameter | Gretio | MaxiAP Diag |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (23 ratings) — better | 2.9 (10 ratings) |
| Positive reviews | 68.4% of reviews — better | 0.0% of reviews |
| Number of ratings | 23 — better | 10 |
| Update frequency | Monthly — better | Every 5 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 40 MB | 104 MB |
| Age rating | 4+ | 4+ |
| Developer | Surreal Development LLC | Autel Intelligent Technology Co., Ltd. |
Customer experience
Gretio
MaxiAP Diag
In-app purchases
Gretio
- Gretio All Access$19.991 Year
- Gretio RPO Pack 1$34.99
- Gretio RPO Pack 2$34.99
- RPO Pack 3$34.99
MaxiAP Diag
- Mazda for one year$21.99
- Mini for one year$21.99
- INFINITI for one year$21.99
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- Lamborghini for one year$21.99
- Mitsubishi for one year$21.99
- Cadillac for one year$21.99
- Chrysler for one year$21.99
- Scion for one year$21.99
- Subaru for one year$21.99
- GMC for one year$21.99
- Buick for one year$21.99
- Audi for one year$21.99
- Acura for one year$21.99
- Lexus for one year$21.99
- Volkswagen for one year$21.99
- Nissan for one year$21.99
- Ford for one year$21.99
- Honda for one year$21.99
- BMW for one year$21.99
- Chevrolet for one year$21.99
- Dodge for one year$21.99
- Hyundai for one year$21.99
- Jeep for one year$21.99
- Kia for one year$21.99
- Mercedes-Benz for one year$21.99
- Ram for one year$21.99
- Toyota for one year$21.99
- Volvo for one year$21.99








