I used the earlier version almost daily starting in June, 2009 on an iPhone 3. In about 2013 my usage got spotty mostly because I was using an out-of-date phone which made entering text too cumbersome.
Im now using the updated Momento on an iPhone 6 and Im back to making diary entries 2 or 3 times a day. I use tags and people and locations and occasionally I add a photo. Everything works as it should. (Or at least as I think it should.) its simple and efficient and reliable.
I added the lock for $2 because not every entry is suitable for public perusing. With Touch ID the lock adds no inconvenience.
Jack Madomo about Momento: Private Journal Diary, v3.4.7