Comparison

Habit Stack vs SleepBlend AI

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Habit Stack

Features
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HabitStack helps you build lasting consistency through small, stackable habits related to fitness, nutrition, recovery, and wellbeing. Why HabitStack? Life is busy. Traditional habit trackers can feel overwhelming with endless lists and guilt-inducing streaks. HabitStack takes a different approach: group your habits into simple stacks that match your daily routines, check in with one tap, and focus on progress rather than perfection. Core Features - Habit Stacking: Group related habits into routines like "Morning Stack" or "Post-Workout Stack" for faster check-ins - One-Tap Completion: Mark habits as done with a single tap, no friction - Offline-First: Works perfectly without internet, syncs when available (premium) - Privacy-Focused: Your data stays on your device, with optional iCloud sync - Calm Design: No pressure, no guilt. Just encouragement and gentle progress tracking Perfect For HabitStack works brilliantly for health-focused habits: - Fitness routines (stretching, walking, strength training) - Nutrition habits (water intake, supplements, meal prep) - Recovery practices (sleep schedule, rest days, mobility work) - Wellbeing rituals (meditation, journaling, time outdoors) Free Tier Get started with up to 5 habits and 2 stacks, completely free. Track your daily completions and view your weekly progress, everything you need to build consistency. Premium Features Unlock your full potential with HabitStack Premium: - Unlimited habits and stacks - Habit templates to get started quickly - Advanced insights and progress analytics - iCloud sync across all your devices - Smart reminders to support your routines - All future features included Our Philosophy We believe free users should succeed, and premium users should optimize. No ads, no dark patterns, no manipulation just honest tools to support your wellbeing journey. Privacy First HabitStack stores your data locally on your device. We don't collect usage analytics, sell your data, or show you ads. Optional iCloud sync (premium) uses your private iCloud account, fully encrypted. Start Building Today Download HabitStack and take the first step towards lasting consistency. Whether you're working on fitness, nutrition, recovery, or general wellbeing, small stackable habits add up to meaningful change. Subscription Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

SleepBlend AI

Create personalized soundscapes for sleep with a multi-layer mixer. Track your sleep quality and discover which sounds help you drift off faster. Enjoy a gentle fade-out timer and on-device processing for privacy.

Highlights
  • Customizable multi-layer sound mixer
  • Real-time sound generation
  • Gentle fade-out sleep timer
  • On-device sleep quality check-in
  • Personalized sound recommendations
  • Sleep Mix Score tracking
Features
Read full description

SleepBlend is a sound console for bedtime. Instead of scrolling a wall of tracks at midnight, you compose tonight's blend from a handful of voices — rain, ocean, wind, coloured noise, a warm drone — each generated on your device in real time, with its own volume and its own place in the stereo field. Nothing to download, and no loop that comes round again at 3am. COMPOSE YOUR OWN SOUNDSCAPE Stack voices in the multi-layer mixer and hear the blend change as you move each slider. The Resonance Ring shows the mix as bands of light around a still centre — when the voices sit in balance it settles into an even halo. A SLEEP TIMER THAT FADES, NEVER STOPS DEAD Set a timer with quick presets and a gentle fade-out over the last few minutes, so the night ends softly instead of cutting to silence. A blend keeps playing with the screen locked. ONE HONEST NUMBER Give a one-minute check-in in the morning — how quickly you drifted off, how rested you feel — and the Sleep Mix Score reflects how each blend works for you. It is built only from your own check-ins, shown with a transparent five-part breakdown, and it stays quiet until there is enough of your own data to be honest. Nothing is measured: no sensors, no wearables, no microphone. IT LEARNS WHICH VOICES SUIT YOU Over time the app surfaces which sounds turn up on the nights you settled faster, labelled as a pattern in your own logs — an association, not a cause. Tonight's recommendation is ranked from the same data. Every one of these calculations runs on your device, from your own entries. FREE, AND GENUINELY USEFUL The whole play loop is free: the full mixer with per-voice volume and stereo balance, the core voices, the sleep timer and gentle fade, the morning check-in, your Nights Composed streak, a nightly wind-down reminder and a 7-night rest trend. Free keeps up to three saved blends — and a blend you have saved is always free to replay, edit, favourite and delete. SLEEPBLEND PRO (optional subscription) - All 50 premium voices, and the starter mixes built on them - Unlimited saved blends, and deeper blends of up to eight voices - Adaptive recommendations with tweak suggestions - The full Sleep Mix Score breakdown, 90-night trends and sound associations - Per-voice Adaptive Volume Fade, and Gentle Wake - Monthly or yearly, with a 7-day free trial - Payment is charged to your Apple ID at confirmation; the subscription auto-renews unless cancelled at least 24 hours before the end of the period; manage or cancel it in Settings SleepBlend is a wellness and relaxation tool. It is not a medical device, not a sleep tracker, and not a treatment for insomnia or any sleep disorder. If sleep trouble persists, please talk to a licensed healthcare provider. Privacy Policy: https://preview.apppublishing.ai/legal/104/privacy Terms of Use (EULA): https://preview.apppublishing.ai/legal/104/terms

Screenshots

Habit Stack4 screens
SleepBlend AI4 screens

Verdict

The call

The clearest difference is iOS requirement: SleepBlend AI at 15.1 against Habit Stack's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Habit Stack sells 3 in-app purchases, starting at $1.99 per month and SleepBlend AI sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 9 level
Habit Stack versus SleepBlend AI: the parameters behind the verdict, then further details
ParameterHabit StackSleepBlend AI
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequencyEvery 2 months—
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhoneiPhone, iPod — better
Requires iOS26.015.1 — better
Further details — not scored
Size13 MB42 MB
Age rating4+4+
DeveloperReuben Enterprises LtdChristian Adrian Harvey-Michael

In-app purchases

3 purchases

Habit Stack

Subscriptions2
  • Monthly1 Month trial$1.991 Month
  • Yearly$19.991 Year
One-time1
  • Lifetime$39.99
2 purchases

SleepBlend AI

Subscriptions2
  • SleepBlend Pro Monthly7 Days trial$9.991 Month
  • SleepBlend Pro Yearly7 Days trial$69.991 Year

Questions

Is Habit Stack free?
Habit Stack is free to download, with in-app purchases available.
Is SleepBlend AI free?
SleepBlend AI is free to download, with in-app purchases available.
Do Habit Stack or SleepBlend AI have ads?
Neither Habit Stack nor SleepBlend AI shows ads.

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