Rise calendar is going in this direction, not fully native app, but pretty decent. Still in private beta though: https://risecalendar.com. Source: about 1 year ago

Yup or you can download to mobile out via their site - https://topia-app.com/. Source: about 1 year ago

Not 100% sure, but I think this is the one they’re talking about: https://topia-app.com/. Source: over 1 year ago

I use Topia for tracking my investment rate and dashboards! (https://topia-app.com/). I find it really helpful to plot out the route to FIRE and see my progress each month. The app seems to have come a long way in the past year. Source: over 1 year ago

Absorb all the great FI content! There are a tonne of great podcasts, books and blogs which have some really good insights/advice/tips I have built a free FIRE app which is designed to help people just starting their FIRE journey which you may find useful. The app breaks down the FI journey into 8 stages to simplify what you need to focus on at each stage. You can also automatically track and monitor your... Source: over 2 years ago

If you want something to go alongside your excel, I created a free FIRE app called Topia which you may find useful. You can connect in your investment/debt accounts, customise your inputs (SWDR, FI number etc) and Topia will build out your timeline to FI and update in real-time. You won't get the complete customisation/personalisation you get with a spreadsheet but it's a good way to get started initially and keep... Source: over 2 years ago