There are a few great apps that can be used in conjunction with an incline treadmill. One is the C25K 5K Trainer app, which is designed for people who are new to running and want to build up their endurance. There's also the Zombies, Run! app, which turns your run into a fun game where you have to outrun zombies. And if you're just looking for some music to keep you motivated, the RockMyRun app has DJ-curated mixes that will keep your feet moving.