I have played with react native + typescript for 2 months and they are great pair.
- Tooling for quality
And i also play with native-base, but we don't have type definitions for it. So i did it.
typings install --save --global github:mrphu3074/typed-native-base#cf8cffbc134055490f8fbdd5ae705b42a704c7d8
P/s: If it can help you, GREAT and sorry about my English skills