I enjoyed playing through Fantasy Chronicles, the story wasn't bad, had some decent characters and graphics, and although basic it held my attention for at least 20+ hours of play (including building a lot of the more challenging item builds). To really get the most out of the game you have to master the item assembly system, since for the post game simple grinding won't win you many battles, strategy, party selection, equipment on your guardian beasts, tactics and various item builds are what matter. What could have made the game really great is an equally long post game.. although I haven't beaten all of the post-end game final bosses, I assume once you beat them that's it. Instead a different reality with different monsters, a higher level cap and a hard difficulty, with added story here and there would give it a lot of replay value and pushed it to the 50+ hours of play.
Most of the pre-end game is easy-normal level of difficulty for a standard RPG, but still enjoyable and about what you would expect. Your characters do still die, you run out of money/supplies to build items, not like some of the RPG's on the app store here where you can just auto-attack through the entire game and skip the dialogue. There are a few nice features, for example if you die to a boss, it allows you to retry the battle. You can also save anywhere in a dungeon. This is helpful for collecting the rare ingredients that certain bosses only drop a low % of the time. Finally the guardian beast combination, equipment, etc. adds another level of battle strategy to the game.
Overall definitely worth the price to JRPG fans, and better than a lot of the more popular titles on the app store, and I look forward to more like this from Kotobuki Solutions!