Another useful tool, Advanced Tally Counter (Pro), is released in Android market. You can use this app to count anything countable, from inventory, customers, laps, to scores, votes. You can have up to 100 counters (in pro version, 3 counter in free version), name each counter, assign button on the phone to count without touching the screen. In pro version, you can even optionally record time stamp for each count, email/share the count result. In either version, counts are saved after exiting. And it is both pretty and easy to use.