First up, thanks for sharing your app with Hacker News tallasif. It takes courage to bring something you made to a place where people will give honest and direct feedback.
I think you've succeeded in making an app that does one small thing simply. Congrats. Simple isn't always easy.
I have a usability concern that I haven't seen mentioned here yet. I like that the keyboard focus jumps to the Reason text box, but I feel that the "What are you spending on?" box needs more emphasis to be the clear main element of your app's UI.
The examples that jump to mind are how twitter puts the "What are you doing" box at the top centre of the app, or how Google puts a lone search box at the page centre.
I think you've succeeded in making an app that does one small thing simply. Congrats. Simple isn't always easy.
I have a usability concern that I haven't seen mentioned here yet. I like that the keyboard focus jumps to the Reason text box, but I feel that the "What are you spending on?" box needs more emphasis to be the clear main element of your app's UI.
The examples that jump to mind are how twitter puts the "What are you doing" box at the top centre of the app, or how Google puts a lone search box at the page centre.
Hope this helps.