You don't necessarily have to choose between cost and quality – sales happen. Don't worry about scouring the Play Store to spot the good deals. We can do that for you.
Apps
Electrum Drum Machine/Sampler – $0.99 from $3.99
CWMoney EX Expense Track – $1.99 from $4.99
Pocket Informant 3 – $6.99 from $9.99
ReLoop Loop DAW – $0.99 from $3.99
WeatherPro – $1.99 from $2.99
Games
The Great Fusion – $0.99 from $2.99
Division Cell – $0.99 from $1.99
Sudoku 10'000 Plus – Free from $2.49 (Amazon)