Slumber Drift

Your Sleep Fuels Every Voyage

Only for iPhone

Free · In-App Purchases

iPhone

Your airship flies as far as you slept. Connect Apple Health, launch your daily voyage, and watch the text log unfold — one night at a time. Last night's sleep decides today's sky. Slumber Drift is a text-based airship game powered by your real sleep data. Sleep well, fly far. Sleep short, drift close. Every morning is a new departure from the same dock — but never the same voyage. — HOW IT WORKS — Connect Apple Health and set your sleep goal. Each morning, Slumber Drift reads last night's sleep and converts it into two stats: VOYAGE POWER — How far your airship can fly. Determined by how many hours you slept relative to your personal goal. DREAM LUCK — The quality of your journey. Shaped by sleep stage depth (Deep + REM). Apple Watch owners unlock the full ceiling; iPhone-only users reach a solid 0.8. Tap Launch Voyage. Watch the text log scroll: crystal earnings, encounters, events, and zone transitions — all animated in 30 to 60 seconds. — CHOOSE YOUR MOMENT — At every encounter, you face a decision. Retreat — lock in your crystals and end the voyage safely. Press On — risk the encounter for more distance, better drops, and milestone rewards. The further you fly, the harder the encounters. A well-rested crew flies farther. A lucky crew survives longer. Sometimes the right call is to turn back. — BUILD YOUR AIRSHIP — Every voyage drops equipment. Fit your airship with Engine, Hull, and Compass pieces to push your stats higher. Rarity tiers: Common · Rare · Epic · Legendary Higher rarities carry more affixes — and at Epic and Legendary, some of those affixes cut against you. A Legendary Compass might grant enormous crystal gains while quietly taxing your encounter odds. Choose wisely. Reroll affixes with Drift Crystals. Sell what you don't need. Curate a loadout for your playstyle. — DREAM TONICS — Spend Drift Crystals on consumable Dream Tonics. Each tonic lasts a set number of leagues before dissolving. Seven types, from route extenders to crystal multipliers to encounter shields. Mix and match active tonics before each voyage to shape the day. — SLEEP STREAKS — Consecutive nights of good sleep build a streak. Streaks unlock tiered buffs — Gentle Breeze, Steady Wind, Strong Gale, and Eternal Trade Wind — that multiply crystal earnings and improve encounter odds. A streak is worth protecting. — MILESTONES — Reach Lg 50, 100, 150, or 200 and the sky rewards you: bonus crystals and a guaranteed rare equipment drop. These aren't random events — they're earned by flying far enough. — HONEST DESIGN — · No ads. No gacha. No pay-to-win. · One voyage per day. No grinding. · Your sleep data never leaves your device. · Read-only access to Apple Health. Slumber Drift never writes. · No server required. Works entirely offline. · One-time Pro unlock. No subscription. No expiration. — SLUMBER DRIFT PRO ($4.99) — Free users experience the full game loop. Pro expands the depth: · Up to 3 equipment drops per voyage (free: 1) · Inventory expanded to 24 slots (free: 8) · Up to 5 active Tonic slots (free: 2) One-time purchase. Yours forever. — Privacy: Slumber Drift requests read-only access to sleep data via Apple Health. All data is processed entirely on-device and is never transmitted or stored externally.

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What's New in v1.1 - Stats explained — Tap the ⓘ icon next to Voyage Power and Dream Luck to see how they're calculated, including formulas, examples, and streak buff tiers. - Sleep streak visibility — Your streak status, active buff, and progress toward the next tier are now shown after each voyage and in the voyage result screen. - Post-voyage stats — Tap "Stats" on the Today's Voyage card to review your Voyage Power and Dream Luck for the day. - Equipment effects at a glance — The Airship tab now shows affix effects (Route, Encounter, Crystal, etc.) directly on each equipped item, so you can see your build without opening details.

Version 1.1

The developer, Takumi Kanzaki, 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 Not Collected

    The developer does not collect any data from this app.

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

    Accessibility

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

    Information

    • Provider
      • Takumi Kanzaki
    • Size
      • 4.1 MB
    • Category
      • Health & Fitness
    • Compatibility
      Requires iOS 18.0 or later.
      • iPhone
        Requires iOS 18.0 or later.
    • Languages
      • English
    • Age Rating
      4+
    • In-App Purchases
      Yes
      • Unlock Pro USD 4.99
      • You're amazing USD 4.99
      • Buy me a meal USD 2.99
      • Buy me a coffee USD 0.99
      • Learn More
    • Copyright
      • © tknzk.com
  • Developer Website
  • Privacy Policy
  • Licence Agreement

    • More by Takumi Kanzaki