Slumber Drift vs Radstep
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Slumber Drift
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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 โ but never the same voyage. โ HOW IT WORKS โ 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 โ How far your airship can fly. Determined by how many hours you slept relative to your personal goal. DREAM LUCK โ 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 โ all animated in 30 to 60 seconds. โ CHOOSE YOUR MOMENT โ At every encounter, you face a decision. Retreat โ lock in your crystals and end the voyage safely. Press On โ 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. โ BUILD YOUR AIRSHIP โ Every voyage drops equipment. Fit your airship with Engine, Hull, and Compass pieces to push your stats higher. Rarity tiers: Common ยท Rare ยท Epic ยท Legendary Higher rarities carry more affixes โ 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. โ DREAM TONICS โ 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. โ SLEEP STREAKS โ Consecutive nights of good sleep build a streak. Streaks unlock tiered buffs โ Gentle Breeze, Steady Wind, Strong Gale, and Eternal Trade Wind โ that multiply crystal earnings and improve encounter odds. A streak is worth protecting. โ MILESTONES โ 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 โ they're earned by flying far enough. โ HONEST DESIGN โ ยท No ads. No gacha. No pay-to-win. ยท One voyage per day. No grinding. ยท Your sleep data never leaves your device. ยท Read-only access to Apple Health. Slumber Drift never writes. ยท No server required. Works entirely offline. ยท One-time Pro unlock. No subscription. No expiration. โ SLUMBER DRIFT PRO ($4.99) โ Free users experience the full game loop. Pro expands the depth: ยท Up to 3 equipment drops per voyage (free: 1) ยท Inventory expanded to 24 slots (free: 8) ยท Up to 5 active Tonic slots (free: 2) One-time purchase. Yours forever. โ 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.
Radstep
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Your steps are your superpower. Radstep turns every walk into a creature-collecting RPG. The more you move in real life, the stronger you get in the game. No grinding, just walking. CATCH & COLLECT RADMON Discover hundreds of wild Radmon with real elemental types, rarities, stats, and hidden potential (IVs). Walk far enough and rare eggs hatch right in your hands. BATTLE WILD RADMON Cross paths with wild Radmon as you walk, then battle them with the team you've raised. Win the fight and you'll catch them for your collection. BREED A DREAM TEAM Pair Radmon, pass down stats and rare traits, and raise the perfect squad. Deep, genetics-based breeding built for walkers. RAID WITH YOUR GUILD Join a guild and team up each week to take down the Guild Boss. Type matchups matter, so build a balanced team. BUILD A STREAK Keep your walking streak alive for celebrations, rewards, and bragging rights. A reason to hit your steps every single day. Radstep is the fitness app for people who hate fitness apps. You won't be counting steps, you'll be hatching, battling, and raiding your way to them. Download, start walking, and catch your first Radmon This service includes paid in-app items, and a separate fee is charged for purchase. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: Slumber Drift at none against Radstep's shown. Slumber Drift also leads on update cadence (every 4 days vs monthly). Radstep's advantage is iOS requirement (15.1 vs 18.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Slumber Drift sells 4 one-off in-app purchases and Radstep sells 17 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Slumber Drift ships an update every 4 days, Radstep monthly. Both last shipped on October 25, 2026.
| Parameter | Slumber Drift | Radstep |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days โ better | Monthly |
| Ads | No โ better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPod โ better |
| Requires iOS | 18.0 | 15.1 โ better |
| Further details โ not scored | ||
| Size | 4 MB | 105 MB |
| Age rating | 4+ | 12+ |
| Developer | Takumi Kanzaki | InstantMoon |
In-app purchases
Slumber Drift
- Buy me a coffee$0.99
- Buy me a meal$2.99
- You're amazing$4.99
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- Unlock Pro$4.99
Radstep
- Radstep Pro Weekly7 Days trial$3.997 Days
- Radstep Pro Monthly$9.991 Month
- Radstep Pro Yearly$99.991 Year
- Energy+$0.99
- Boardchain event 1$1.99
- Big Event Pack$2.99
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- Boardchain event 2$2.99
- 150 Gold$2.99
- Board Event Pack$4.99
- Weekly Card$4.99
- Wall Breaker$4.99
- 440 Gold$6.99
- Wall Breaker (large)$9.99
- 1020 Gold$14.99
- Monthly Card$19.99
- 2400 Gold$29.99
- Radstep Pro Lifetime$299.99









