DeepSeek chat app tops US App Store
Free DeepSeek app (R1 inside) became the most-downloaded free iOS app in the US on 2025-01-27, ahead of ChatGPT.
R1 made reasoning free to consumers via the app and web; downloads and the open paper triggered a one-day AI-stock sell-off and a global rethink of compute needs. Large-scale cyberattack forced a pause on new registrations the same day.
- Date
- Monday, 27 January 2025
- Lab
- DeepSeek
- Kind
- product
- Access
- app only
- Price
- free
Figures
| Measure | Value | Measured by |
|---|---|---|
| Nvidia share price move, 2025-01-27 | about -18% (reported) Second-hand via Wikipedia's summary of news coverage; primary market data not opened | independent |
Sources are Wikipedia pointers to Reuters/CNBC/Bloomberg coverage that could not be opened here (403/blocked); market-impact figures need primary confirmation. App first launched on iOS and Android 2025-01-10.
Sources
This record was checked against its sources on 6 October 2026. How we check