The free version is nice and easy to use, but I think you need the paid version to do custom programs. Luckily, they have a reasonably priced lifetime subscription price, unlike a lot of the apps owned by major companies.

There's a bit of a learning curve for setting up complicated progression programs, but that's because it has a huge amount of flexibility. For example, you can build a 4 week progression plan with heavy days and light days where the weights are all calculated on a custom scale and it will provide some recommendations, but you still have to pick all the options you want.