Aetherium Hearts

Idle dungeon RPG and its tales

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Each bard's air now has its own tune, and a song plays by the campfire. Watch your adventurers dive, read their tale, send them back down: an idle dungeon RPG. Raise adventurers in Selwyn, town of the Ash Marches, and send them down into the labyrinths. The expedition runs by itself — they walk, they fight, they gather, and sometimes they fall. Those who come back bring the whole of it with them, written up by an AI as a single tale. No two are ever the same. ◆ Three labyrinths The Ashen Corridor, the Frostcrystal Archive, the Ember Crucible. Each runs to a different depth and a different danger, and at the bottom of each an Aetherium Heart lies sleeping. ◆ It runs on its own Once they are down there, they walk and fight on their own feet. The descent continues while the app is closed. ◆ Tales The record of a returning expedition is woven into prose by an AI. Send it straight to X, Threads, Bluesky or Discord. ◆ The town and your company An armoury, a general store, a forge, the guild, a temple, a shrine — Selwyn holds nine places to go. You can also go looking for an adventurer who has gone missing. ◆ Standings Set the Aetherium Hearts you have offered at the Shrine of Astel against every adventurer in every town. Japanese and English, switching with your device. Free to play, with no in-app purchases.

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- The bard's airs now have music. Turn on "Play music" in the guide to hear it while an air is playing and while the party is camped. - An ad banner now appears at the top of the screen. - Once every 12 hours you can watch a video to revive, unpetrify or buy leads without gold.

The developer, Hitoshi Igarashi, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Location
    • Identifiers
    • Usage Data
  • Data Linked to You

    The following data may be collected and linked to your identity:

    • User Content
    • Identifiers
    • Usage Data
    • Other Data
  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Location
    • Identifiers

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
Hitoshi Igarashi
Size
57.6 MB
Category
Roleplaying
Compatibility
Requires iOS 16.4 or later.
  • iPhone
    Requires iOS 16.4 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
Japanese
Age Rating
13+
  • 13+
  • Frequent
    Cartoon or Fantasy Violence
    Contests
    Guns or Other Weapons

    Infrequent
    Mature or Suggestive Themes
    Horror/Fear Themes

    Contains
    Advertising
    User-Generated Content
Copyright
© 2026 Hitoshi Igarashi