flutter pedometer -- 2

Need flutter app which can store the steps count data (taken from pedometer) to the local sqflite database after some interval of time (i.e on regular intervals may be after every half an hour). Data must also be saved to the sqflite in case of app closed or If an user kill the app. Means the APP must run in background and store the data in to the database. Database must be having a table with name steps_count which must be having step_count and timestamp (time at which the data was captured and stored into the db). APP must run on both android as well as on IOS. You will not use any paid library. Source code will also be required.