A little late to the party, but I ended up making a companion app for MHST3
Hi hunters!
I'm Jarvis Lee. I made a companion app for MHST2 a few years ago, and I honestly didn't expect it to be used for this long.
But people kept sending me feedback, bug reports, translation fixes, and sometimes just very kind messages asking whether I would make one again if there was another Stories game. So when MHST3 came out, I felt I should give it another try.
If you used the MHST2 app before, some parts may feel familiar, but MHST3 changed a lot in both gameplay and data structure. So I ended up having to rebuild most of it from scratch, rather than just carrying stuff over. The maps, monster pages, weapons/armors, gene tools, quest info and other sections were all made for this game.
The new app is called GameCat: MHST3. It is a fan project, not an official app, but I tried to make it useful as a real companion while playing rather than just a list of tables.
For MHST3, I ended up putting in all the things I personally kept alt-tabbing to look up: maps with gathering points, treasure chests, hidden Poogies, monster traces, monster weaknesses and part break info, a gene simulator with bingo counts and stats, and a few other tools I thought would actually help while playing.
The monster behavior page is the part I spent a lot of time on. I wanted it to be useful during an actual fight, not only as a database page. So it tries to show things like morph changes, turn conditions, part break effects, and attack type hints in a more readable way.
The map part was also a big one. My goal was that when you open a map, you can see the important points in that area at a glance and feel reasonably sure you are not missing something useful.
A lot of the data is pulled directly from the game files, but some things I had to figure out myself, so there are probably mistakes. If something looks off or weird, please tell me, I’ll fix it as fast as I can.
Oh, and one quick note: most of the app is free. A few of the deeper tools are behind a simple one-time purchase -- nothing recurring, no nonsense. Gotta feed the Palicoes somehow ;)
For Android, I chose to release the APK on GitHub so I can publish fixes and updates more quickly, and also keep the release process simple with fewer extra complications. You can find it here: https://github.com/ooizumi/mhwotomo/releases/tag/v1.0.8-mhs3-official
I know sideloading an APK isn’t nothing, so I kept the Android build really bare-bones: no unnecessary permissions, no extra data collection, just the app.
For iOS, please search GameCat MHST3 on the App Store.
I hope it helps a little with your journey. And if there is some tool or hidden number you really want to see in the app, please leave a comment or DM me. I can't promise everything, but if it is something I can dig out or calculate, I would love to try.