# Diag-USA > USA vehicle diagnostic software package for MaxiAP200 users. (iPhone/iPad app by Autel Intelligent Technology Co., Ltd..) - Source: https://appshunter.io/ios/app/diag-usa/id1434670235 (this page in markdown: same URL + `.md`) - Developer: [Autel Intelligent Technology Co., Ltd.](https://appshunter.io/developer/770747094) - Category: Utilities, Productivity - Price: Free - Rating: 2.70/5 from 46 App Store ratings · 22 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 206 MB - Languages: German (Germany), American English, French (France), Italian, Japanese, Korean, Dutch, Persian, Polish, European Portuguese and 7 more - Released: 2018-09-21 - Data updated: 2026-08-18 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/diag-usa/id1434670235/reviews.md ## What is Diag? Diagnostic software package for USA vehicles, which requires to work with the main program MaxiAP200 together. ## Key features - USA vehicle diagnostics - Requires MaxiAP200 - Detailed vehicle information ## Recent user reviews (10 of 22) All indexed reviews: https://appshunter.io/ios/app/diag-usa/id1434670235/reviews.md ### 1/5 — Won’t work on newer cars *2025-02-22* Bought the GM module and it only works on cars older than 2019. Total waste of money and it doesn’t tell you what’s supported until you buy a pack. ### 1/5 — App issue *2024-11-19* App issue can’t load the previous application ### 1/5 — Not working AP200 *2024-06-23* Since last update I can no longer activate my tpms relearn. Smh bug fix yeah right ### 1/5 — Für Ford Bezahlt und funktioniert nicht! *2022-06-18* Die App zeigt nix an und lässt keine Diagnose durchführen. Unverschämtheit ### 1/5 — They broke the app. *2022-03-16* “fix some bug” is what they said the update was. Yep, you fixed it alright. Locked my VCI box and made it a brick. No response from support at all. Shame on a company that randomly locks your device from being used for no reason at all. ### 1/5 — Doesn’t connect via Bluetooth *2022-03-08* The device does not connect via Bluetooth to the phone app. I want a refund. 😡 ### 1/5 — Not connecting , payed over $100 for additional features for nothing! *2022-02-14* Not connecting , payed over $100 for additional features for nothing! ### 4/5 — Goes crazy *2022-01-22* Getting dtc’s is a bit tricky ### 1/5 — Won’t bind or connect *2021-09-04* Won’t bind or connect I had one a couple years back that was great and I lost it I recently had purchased one at the swap meet for 45.00 and it’s trash won’t do anything I know it’s not broke because the package was in open so I’m giving one stare for that reason I really really need it and it won’t work ### 3/5 — Bluetooth function is garbage *2021-06-27* I have to fight this stupid app to get to acknowledge the device. It says connect to Bluetooth yet Bluetooth says it’s connected device light goes from green to blue. Still the app says it connect to Bluetooth. ## Frequently asked questions about Diag ### What vehicles does Diag-USA support? Diag-USA is designed for USA vehicles. It requires the MaxiAP200 main program to function with these vehicles. ### Is Diag-USA free to use? Yes, Diag-USA is available for free. There are no in-app purchases or ads mentioned. ### What devices can I use Diag-USA on? Diag-USA is supported on iPhone and iPod devices. It is not currently listed for Android or other platforms. ### How often is Diag-USA updated? The latest version, 1.47, was released on September 5, 2023. The app was initially released on September 21, 2018. ### What is the age rating for Diag-USA? Diag-USA has an age rating of 4+. This indicates it is suitable for a wide range of users. ### What is the user rating for Diag-USA? Diag-USA has an average rating of 2.8 stars from 45 ratings. This suggests mixed user satisfaction. ### Does Diag-USA work without the MaxiAP200? No, the description explicitly states that Diag-USA requires the main program MaxiAP200 to work. ## Version history (last 5 releases) ### 1.47 — 2023-09-05 fix some bugs ### 1.46 — 2023-07-20 fix some bugs ### 1.45 — 2022-11-22 fix some bugs ### 1.44 — 2022-09-06 fix some bugs ### 1.40 — 2022-02-14 fix some bug ## Apps similar to Diag | App | Rating | Price | Category | | --- | --- | --- | --- | | [NexzScan](https://appshunter.io/ios/app/nexzscan/id1450589621) | 2.1 (27) | Free | Utilities | | [Autel MaxiFix](https://appshunter.io/ios/app/autel-maxifix/id1513913712) | 2.3 (3) | Free | Utilities | | [EasyDiag4](https://appshunter.io/ios/app/easydiag4/id1505477232) | 2.9 (19) | Free | Utilities | | [RepairSolutionsPRO](https://appshunter.io/ios/app/repairsolutionspro/id1244995218) | 3.7 (20) | Free | Utilities | | [OBD2 Scanner ELM327: GaragePro](https://appshunter.io/ios/app/obd2-scanner-elm327-garagepro/id1488423694) | 4.3 (19) | Free | Utilities | | [Xtool Anyscan](https://appshunter.io/ios/app/xtool-anyscan/id1435757731) | 2.8 (77) | Free | Utilities | ## More apps by Autel Intelligent Technology Co., Ltd. - [AutoLink100](https://appshunter.io/ios/app/autolink100/id770747091) - [X-MEMO](https://appshunter.io/ios/app/x-memo/id951585624) - [MaxiAP](https://appshunter.io/ios/app/maxiap/id1247339344) - [MaxiAP-AP200](https://appshunter.io/ios/app/maxiap-ap200/id1338602548) - [Diag-Asia](https://appshunter.io/ios/app/diag-asia/id1432403324) - [Diag-Europe](https://appshunter.io/ios/app/diag-europe/id1432416782) All apps by Autel Intelligent Technology Co., Ltd.: https://appshunter.io/developer/770747094 ## Related topics [hyper tough ht200](https://appshunter.io/ios/topics/hyper-tough-ht200) · [ht200](https://appshunter.io/ios/topics/ht200) · [maxi ap200](https://appshunter.io/ios/topics/maxi-ap200) · [autel maxiap200](https://appshunter.io/ios/topics/autel-maxiap200) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-18.*