Here is an idea for a heart rate tracking application. Be kind and share some L - Love.
the seven could somehow overlay with the "S" like the bars do above
Banked iOS App Icon by ALEX BENDER - Dribbble
Substratum Product Icon
App Icon by Jackie Tran
Chat Bubble App Icon
This entrance for an application through logging in is strong since it is clear and attractive. The continuous lines in the background against the writing section is very clean cut and the colour are neutral, particularly for the audience.