# Slumber Drift: Idle RPG — Your Sleep Fuels Every Voyage

> Your Sleep Fuels Every Voyage (iPhone/iPad app by Takumi Kanzaki.)

- Source: https://appshunter.io/ios/app/slumber-drift-idle-rpg/id6760349482 (this page in markdown: same URL + `.md`)
- Developer: [Takumi Kanzaki](https://appshunter.io/developer/1820952468)
- Category: Health & Fitness, Games, Adventure, Role Playing
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 4 MB
- Languages: English
- Released: 2026-03-19
- Data updated: 2026-07-02
- User reviews in markdown: https://appshunter.io/ios/app/slumber-drift-idle-rpg/id6760349482/reviews.md

## What is Slumber Drift?

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.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Buy me a coffee | $0.99 | one-time |
| Buy me a meal | $2.99 | one-time |
| You're amazing | $4.99 | one-time |
| Unlock Pro | $4.99 | one-time |



## Version history (last 5 releases)

### 1.5 — 2026-04-14

Inventory & Equipment improvements:

· Filter inventory by slot — tap Engine, Hull, or Compass to find gear faster.
· Equip, Reroll, and Sell are now separate, clearly labeled buttons in the equipment detail view.
· Reroll and Sell now ask for confirmation before spending crystals or discarding gear.
· Improved text readability throughout the Airship screen.

### 1.4 — 2026-03-29

Bug fixes and performance improvements.

### 1.3 — 2026-03-25

- Fixed an issue where Retreat/Press On buttons could reappear after a voyage had already ended.
- Fixed bedtime and wake time displaying the same time for some Apple Watch users.

### 1.2 — 2026-03-24

Fixed an issue where bedtime and wake time could display the same time for Apple Watch users when only sleep stage data (no "In Bed" samples) was recorded.

### 1.1 — 2026-03-20

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.

## More apps by Takumi Kanzaki

- [Kids Daily Checklist & Routine](https://appshunter.io/ios/app/kids-daily-checklist-and-routine/id6747349548)
- [おじいちゃんといぬ](https://appshunter.io/ios/app/id6747392810)
- [ChoresLogs&Allowance](https://appshunter.io/ios/app/choreslogs-and-allowance/id6747800793)
- [StrideMap: Step & Mile Tracker](https://appshunter.io/ios/app/stridemap-step-and-mile-tracker/id6748224869)
- [Lab Gone Wrong](https://appshunter.io/ios/app/lab-gone-wrong/id6748272674)
- [DepthDrift - Idle Cave RPG](https://appshunter.io/ios/app/depthdrift-idle-cave-rpg/id6748545569)

All apps by Takumi Kanzaki: https://appshunter.io/developer/1820952468

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-02.*