I tried to update Hello Cycling app, and it said 'Your device is not compatible with the app anymore.'
I searched and found announcement by OpenStreet, developer of Hello Cycling app. It said 'End of Support for OS under iOS17 and Android 11.'
I looked at my Android version, and it was 'Android 10'. I started searching for new smartphone, but the price was expensive.
But I found smartphone rental service by Rentio. It was around 2,000JPY (20USD) monthly!