Comparison

SleepHack vs Grello

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

Head to head
About

SleepHack

This app uses adaptive binaural frequencies and an intelligent sleep engine to optimize your sleep cycles for deeper rest and improved performance. It offers performance-first sleep tracking and a smart alarm to wake you at the optimal moment.

Highlights
  • Adaptive binaural frequencies
  • Intelligent sleep engine
  • Performance-first sleep tracking
  • Smart alarm
  • Deep sleep enhancement modes
Features
Read full description

ADAPTIVE WHITE NOISE ENGINEERED FOR DEEPER SLEEP Sleep isn’t relaxation. Sleep is performance. SleepHack is built for people who want deeper sleep, sharper focus, and higher output — not just background noise. This isn’t another white noise app. This is adaptive sleep optimization. WHY SLEEPHACK? • Adaptive binaural frequencies that shift with your sleep • Engineered sound designed to push deeper rest • Performance-first sleep tracking • Built for high achievers, founders, athletes, and optimizers If you treat your body like hardware, your sleep needs better software. HOW IT WORKS • Intelligent Sleep Engine responds to your movement patterns • Adaptive audio evolves through the night • Designed to support Deep, Core, and REM cycles • Smart alarm that wakes you at the right moment You don’t just play sound. You run a sleep protocol. WHO IT’S FOR • People who wake up tired even after 8 hours • High performers who want a competitive edge • Anyone serious about recovery and mental clarity • Those who want more than “rain sounds” If you care about output, you should care about sleep architecture. FEATURES • Adaptive Binaural Audio • Deep Sleep Enhancement Modes • Smart Alarm • Minimal, performance-driven interface • Ongoing upgrades and sleep protocol refinements STOP GUESSING. START OPTIMIZING. Your sleep is either helping you win or holding you back. Hack it. If you choose to connect your sleep data from HealthKit, SleepHack can use that additional data to improve prediction accuracy as it learns your patterns. Your data is only used with explicit in-app consent, and you remain in control of what is shared. Terms of Service: https://sleephack.app/terms

About

Grello

Read full description

What if 2 minutes a day could physically change your brain? Neuroscience shows that 8 weeks of gratitude practice increases grey matter, boosts dopamine and serotonin, and reduces stress. Grello makes the habit effortless — with an AI companion that knows you, remembers your journey, and meets you where you are. YOUR AI COMPANION Choose from 5 unique companions, each trained in gratitude science, CBT, and positive psychology. Your companion remembers what you share, asks deeper questions over time, and never judges — even on hard days. JOURNALING THAT DOESN'T FEEL LIKE WORK Write 3 things you're grateful for. Stuck? Tap "Need ideas?" and your companion will chat with you to uncover moments you didn't even realise mattered — then tap to add them to your entry. 1000+ AFFIRMATIONS Swipe through a curated library of affirmations. Save the ones that hit. As you use the app, new AI-generated affirmations appear based on your personal goals and themes. EVERYTHING STAYS ON YOUR DEVICE No accounts. No cloud. No tracking. Your journal entries, conversations, and memories never leave your phone. ALSO INCLUDED - Mood detection on every entry - Streak tracking to build your habit - 6 colour themes to make it yours - 15 languages supported - Daily reminders at any time you choose - Export your journal as CSV anytime TRY FREE FOR 3 DAYS Then $29.99/year ($0.58/week) or $1.99/week. Cancel anytime. Payment is charged to your Apple ID account. Subscription auto-renews unless cancelled at least 24 hours before the end of the current period. Manage subscriptions in Settings. Terms of Use: https://gratitude-ai-proxy.joegcraig23.workers.dev/terms Privacy Policy: https://gratitude-ai-proxy.joegcraig23.workers.dev/privacy

Screenshots

SleepHack4 screens
Grello4 screens

Verdict

The call

The clearest difference is ads: Grello at none against SleepHack's shown. On price, in-app purchases, device support and iOS requirement 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. SleepHack sells 8 in-app purchases, starting at $4.99 per 7 days and Grello sells 2 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 9 level
SleepHack versus Grello: the parameters behind the verdict, then further details
ParameterSleepHackGrello
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 6 days—
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.1
Further details — not scored
Size112 MB51 MB
Age rating12+4+
DeveloperSMB Studio LLCJoseph Craig

In-app purchases

8 purchases

SleepHack

Subscriptions7
  • Pro Weekly$4.997 Days
  • Pro Weekly$6.997 Days
  • Pro Monthly$9.991 Month
Show 4 more
  • Pro Annual$19.991 Year
  • Pro Annual3 Days trial$29.991 Year
  • Pro Annual3 Days trial$39.991 Year
  • Pro Annual$39.991 Year
One-time1
  • Lifetime AccessFree
2 purchases

Grello

Subscriptions2
  • Grello Premium$1.997 Days
  • Grello Premium$29.991 Year

Questions

Is SleepHack free?
SleepHack is free to download, with in-app purchases available.
Is Grello free?
Grello is free to download, with in-app purchases available.
Do SleepHack or Grello have ads?
SleepHack shows ads; Grello does not.

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