Dalo Lite is a preview version of Dalo. It has most of the functionality of the full version but the total number of tasks is limited to 50. In addition, iCloud backup, lists and a few other features of the full version are not included.
You can use it to test if it fits your way of working and the methods you use. However, once you reach the 50-task limit, you won't be able to add any new tasks. You can then either delete the old ones and start again or check out the full version on the App Store.