NGM Flasher vs IsiChat
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NGM Flasher
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The revolution in vehicle tuning: The world's first app specifically for performance models from VW, Audi, SEAT, Å koda, and Porsche. Developed by engineers - made for true enthusiasts. In the exciting world of the automotive industry, innovations are constantly changing the experience we have with our cars. One of these groundbreaking developments from leading experts and tuning enthusiasts is this tuning app. This app opens up a whole new dimension for vehicle owners to optimize their car's performance, transmission, and sound. Using advanced algorithms and real-time data, we can easily optimize the engine and transmission control unit for improved performance, shifting, efficiency, and sound. Users can customize their engine's performance, creating a customized driving experience. Safety and reliability are our top priority. The developers have implemented various safety features to ensure that the changes do not affect the functionality or safety of the vehicle. Regular updates ensure that the app keeps pace with the latest vehicle models and technological developments. After purchasing the app license and the OBD adapter, plug the adapter into the car's OBD port. Then, connect the iPhone/iPad to the OBD adapter/car. The first flash process takes 20-25 minutes. After that, each flash process takes only 2-3 minutes to switch between the vehicle's original power and all other available power levels, transmission variants, and sound configurations. This creates a unique and exciting experience for the driver! Supported engines: - EA888 gen3 / gen4 - EA855(evo) - EA824 (4.0 TFSI, 5.2 FSI) - EA825 (4.0 TFSI) - EA839 (2.9 / 3.0 TFSI) A complete list of supported vehicles can be found on our website. www.ngmapp.com
IsiChat
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IsiChat – Your personal AI chat for iPhone and iPad IsiChat is a powerful and privacy focused AI chat app designed for users who want full control over models, costs and data security. Use your own API keys (OpenRouter and optionally Google Gemini) and choose exactly which models you want to work with. All chats, images and vision data are stored locally on your device. No cloud, no ads, no subscription. You top up your credit at OpenRouter and pay only for what you actually use. Features • Chat with more than 500 AI models, automatically pre sorted based on your request • Text and image messages, including multiple images in a single request • Vision mode for generating, analyzing and editing images, with streaming, preview, model display and expandable large view • Move, delete or directly select images for editing • Local storage of all chats and image lists, no server access • Archive, restore and manage favorites • ImageViewer with multi image playback • Integrated image editing and automatic Base64 upload • Adjustable window sizes and a refined, clean layout • CodeInlineBlock with selectable themes, light and dark switch and optimized syntax rendering • Text to speech and voice playback • Automatic light and dark mode for the entire app • Dynamic model title display in iPhone landscape mode • Balance display for full cost transparency • System prompt switching with correct title handling • Option to disable individual responses to reduce costs Simple. Clear. In your control. IsiChat is built with attention to detail and avoids unnecessary complexity. Everything runs locally, giving you full control over your data, your costs and your conversations at all times.
Screenshots
Verdict
The clearest difference is iOS requirement: IsiChat at 17.6 against NGM Flasher's 27.0. On price, update cadence, 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. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on November 7, 2026 and November 9, 2026 respectively.
| Parameter | NGM Flasher | IsiChat |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 27.0 | 17.6 — better |
| Further details — not scored | ||
| Size | 24 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | NGM App GmbH | Klaus Gutsch |
In-app purchases
NGM Flasher
No in-app purchases
IsiChat
No in-app purchases









