Whatever we do seems that our average ranging does not improve?

We just improved the rating loop and have received nice amount of new ratings, despite that our average rankings does not improve. We have been on the average ranking of 50 for around year or two. Do you have any tips or is the competition just too much still for us? The app is SparkReceipt

https://preview.redd.it/yjz6s7xb756g1.png?width=1620&format=png&auto=webp&s=90cff6f08a71ee4c30ac12a059127f437cb6c53f

https://preview.redd.it/mdi34j1m756g1.png?width=2408&format=png&auto=webp&s=0f222bea4e233d65a000ef1f8693c55b86c83437