# MG Flasher — user reviews > 21 indexed App Store user reviews of MG Flasher by JR Auto Performance Inc., rated 4.50/5 from 89 ratings. - Source: https://appshunter.io/ios/app/mg-flasher/id1492813749/reviews - App overview in markdown: https://appshunter.io/ios/app/mg-flasher/id1492813749.md - Rating breakdown: 5★ 74 · 4★ 5 · 3★ 0 · 2★ 1 · 1★ 9 ## Newest reviews (5 of 21) ### 5/5 — Very useful *2021-03-06, version 278* Would highly recommend ### 5/5 — Night and Day *2020-11-02, version 258* Used this to flash my 2020 420i with a B48 engine. The stage 1 98oct flash is incredible even with all stock parts no bolt Ons it has transformed my car drastically. The performance gains are definitely worth it. ### 5/5 — Great product great support *2020-09-25* This product is awesome. The extra power for my B58 is kick-in-the-pants noticeable. I’ve sent them a question twice now and both times responded quickly and helpfully. Highly recommend. ### 5/5 — Review *2020-05-30* I’ve been using MG Flasher since I believe March 2019, I’ve put roughly 20k miles on my 2018 340i XDrive since release and it’s awesome. I started with the android app and switched to iOS when it was released. It’s cloud based now so you aren’t locked into a specific system anymore. I flashed initially with cable but now use the Thor wifi adapter. The car feels great, beast at times when I push it, it’s the ultimate sleeper and daily driver. I also flashed with the recommended xHP transmission flash, running stage 3. I drove the mg flasher stage 1 for roughly 2/3 of the miles and the last 1/3 with stage 2 since I installed the Precision CG-1 downpipe and BMS intake. I’ve had zero issues, absolutely none. This is my first BMW and now I’m spoiled. I’ve read about how people have to remove the ecu to unlock and mail away for the G20 and for other brands. This is so easy it’s ridiculous. I haven’t dyno tuned, but the car must be in the 480-500HP at the crank range now. I’m looking forward to stage 3 once it’s released. ### 5/5 — The best tuning company! *2020-02-29* Been using these guys for about a year, anytime I have ever had a question they were quick to get back to me and help me. These guys special in a couple bmw models and IMO are masters at their craft! ## Most critical reviews (10 lowest-rated) ### 1/5 — App no longer function after update *2026-07-26* None of the custom controls are working I can’t even check for a code it just won’t respond to any of the clicks and has a ! Inside of a green circle next to every option , please advice I’ve already emailed twice about this and waited almost a week for a response. ### 1/5 — Hard to use, BM3 way better *2025-07-10* Just had a horrible experience with mg flasher ancient interface that it seems MHD clone it. But after I switched to Bootmod3 everything with the power is good now. Shouldn’t have wasted my time ### 1/5 — 大陆帐户无法登录 *2025-06-15* 大陆手机号码无法接收验证码 ### 1/5 — Terrible service *2025-02-26* Never have been able to use any tune. They attempted to fix it once then ignored many follow up emails. They don’t want to deal with their own software issues if it takes time or costs them a refund. ### 1/5 — Spam *2021-09-12* Spam ### 1/5 — Not as good as bm3 *2021-09-10, version 295* Slower times than a bm3 stage 1, no where near as fast as advertised, poor customer support, don’t think I’d recommend this platform over others ### 5/5 — Интерфейс *2026-07-21* Сделайте пожалуйста поддержку русского языка 🇷🇺🇷🇺🇷🇺 ### 5/5 — The best interface for B58’s *2024-07-16* Plain and simple, this is the best interface for the gen 1 B58. I looked at MHD and Bootmod3 and this one was the easiest to use for me. Their customer service is great as well. ### 5/5 — Awesome platform *2024-07-13* I mostly switched over to this platform for the antilag options but I began to love it even more because they allow you to play with so many more perimeters than the other platforms allow for. Definitely love it so far ### 5/5 — Easy to use and a leader in the field *2024-01-31* I have had nothing but a great experience with the tune. It is super easy to use and with an Ethernet cable, I can flash my 340i within 1 minute. ## Most praised reviews (6 highest-rated) ### 5/5 — MG *2022-11-24* Amazing platform ### 5/5 — Stage 2 m140i *2022-07-09, version 343* Very good and easy to use ### 5/5 — Best ECU flash for B58 even at high altitude *2022-06-03* Having tested MHD and BM3, by recollecting data from logs, dyno and dragy times, I can tell that by far MG flasher has the best OTS maps available for the B58 engine. The time gains in high altitude environments (8600ft) and low altitude envs is remarkable, without putting the engine components under maximum stress (from the data I’ve read on the logs testing the multiple maps they offer) which make them very reliable maps. I’ve been running stage 2 for 1 year in a 2018 M240i with 0 issues. Also the app is very well crafted and easy to use. The flash itself is very smooth, and it has great features such as map switching on the fly which is great feature for those out there using pump gas for the regular commute and E30 on the weekends. Their support is great and they always listen an reply to your questions in a timely fashion. I just have positive words for MG flasher and no complains, keep the great work guys. ### 5/5 — Mr Simon Duke *2022-01-11, version 316* Very good product enjoying very much and likening the new updates for the B58 engine. Keep up the good work and will look forward to newer updates for the future on the BMW B58. ### 5/5 — Amazing! *2022-01-03, version 315* I’ve used a few OTS options for mapping cars and a number of custom tuners and the quality of the app along with the customer service is amazing👌🏼 ### 5/5 — Great app *2021-03-25* Love how easy it is to use and great tunes --- *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 2026-08-06.*