iRewardHealth - Motivating healthy behavior change
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Tep - Fitness tracker meets tamagotchi. Don't starve it!
MIT App Inventor - App Inventor is a cloud-based tool, which means you can create apps for phones or tablets right in your web browser.
Physio Health - Stay healthy, get rewards.
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.