Diag vs ThinkCar Bay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Diag
This diagnostic software package is designed for BMW vehicles. It requires the MaxiAP200 main program to function. Access detailed vehicle diagnostics and information.
- BMW vehicle diagnostics
- Requires MaxiAP200
- Diagnostic software package
- Vehicle information access
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Diagnostic software package for BMW vehicles, which requires to work with the main program MaxiAP200 together.
ThinkCar Bay
This service application supports THINKCAR automotive diagnostic products. It offers tutorials, case studies, after-sales service, and online viewing of diagnostic reports. Manage your products and get assistance with their use.
- Product tutorials
- Case studies
- After-sales service
- User product management
- Online diagnostic report viewing
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Thinkcar bay is a service application for THINKCAR brand products, providing users who have purchased various types of automotive diagnostic products with tutorials, case studies, after-sales service, user product management and online viewing of diagnostic reports for various products, providing assistance to users in the process of using the products.
Screenshots
Verdict
The clearest difference is rating: ThinkCar Bay at 3.8 against Diag's 2.8. ThinkCar Bay also leads on review sentiment (50% vs 9%) and iOS requirement (9.0 vs 13.0). Diag's advantage is update cadence (every 2 months vs every 5 months) and ratings volume (23 vs 4). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
ThinkCar Bay holds the better App Store score, 3.8 against 2.8. That said, the two scores are not equally well evidenced: Diag has 23 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 9% of Diag's written reviews are positive against 50% of ThinkCar Bay's.
Diag ships an update every 2 months, ThinkCar Bay every 5 months. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.
| Parameter | Diag | ThinkCar Bay |
|---|---|---|
| Price | Free | Free |
| Rating | 2.8 (23 ratings) | 3.8 (4 ratings) — better |
| Positive reviews | 9.1% of reviews | 50.0% of reviews — better |
| Number of ratings | 23 — better | 4 |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 582 MB | 215 MB |
| Age rating | 4+ | 17+ |
| Developer | Autel Intelligent Technology Co., Ltd. | THINKCAR INC |
Customer experience
Diag
ThinkCar Bay
In-app purchases
Diag
No in-app purchases
ThinkCar Bay
No in-app purchases
