Here is a (very) simplistic non-persistent TODO app implemented in both Ionic 2 and React Native for the sake of comparing both frameworks.

The code is here: rn/todoapp.js.

To try:

cd rn
npm install
react-native run-android

The code: (based on the _blank template)

• Typescript: ionic2/app/pages/home/home.ts
• Template: ionic2/app/pages/home/home.html

To try:

cd ionic2
npm install
ionic serve

Note: In the limited amount of time spent on this I couldn't figure out how to properly style the "Hide done" toggle.

The code can, and should, be better. Only one component was used in React Native to contain most of the code in one place. The same goes with Ionic, although there may be more absurdities there as I'm not as familiar with that framework. Feel free to submit a pull request if I've made ridiculous mistakes.

Do whatever you want.