Comparison

Cube Guide vs Sharp

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

Head to head
About

Cube Guide

Features
Read full description

Your all-in-one app for learning to solve Rubikโ€™s Cube puzzles. From beginner-friendly 3ร—3 guides to advanced speedcubing algorithms, this app helps you learn, practice, and improve. Explore popular solving methods like CFOP and Roux, study cases such as OLL, PLL, and ZBLL, and find methods for multiple cube types including 2ร—2, 3ร—3, 4ร—4, 5ร—5, Pyraminx, and more. Use the notation guide to understand cube moves, save your favorite algorithms for quick review, and track which cases you have already learned. Inside the app: Step-by-step beginner 3ร—3 guides Extensive algorithm library CFOP, Roux, and other solving methods OLL, PLL, ZBLL, and more advanced cases Notation reference page Progress tracking Favorites 11 supported languages Completely redesigned interface Whether you are just starting or already speedcubing, the app gives you a fast and convenient way to learn cube algorithms and improve your solving.

About

Sharp

Features
Read full description

Sharp turns stoic philosophy and timeless mental models into a daily habit you actually use. Every day, a small set of cards. Each one takes a single timeless idea, explains it in plain language, shows you what it looks like in real life, and gives you one small way to put it to work today. No feeds. No noise. No typing. Just one sharp idea at a time. This isn't a summary app. It's the opposite of more. Sharp is built on depth over volume โ€” making one principle stick and get used, instead of drowning you in highlights you'll never open again. HOW IT WORKS Open Sharp. Read a card. Each card gives you one principle, explains why it's true, shows you a real situation where it applies, and ends with a concrete nudge โ€” something to notice, try, or decide before the day is out. Tap to commit. Tap to save. That's the whole ritual. Come back tomorrow. A fresh set waits. WHY SHARP โ€ข A daily ritual, not a firehose. A small set of cards a day, designed to be read in a calm minute and remembered. โ€ข Built to apply. Every card ends with a concrete move โ€” not vague inspiration, but something real you can do today. โ€ข Track your streak. See your habit build, day by day. Calm and encouraging โ€” never shaming. โ€ข Share what resonates. Send a card to someone who needs it. A single great idea, passed on. โ€ข Save what matters. Build a personal collection of the principles you want to live by. โ€ข Depth over volume. Fewer ideas, understood properly, beat a thousand you scrolled past. WHO IT'S FOR Sharp is for curious, ambitious people who want the edge that great strategy and philosophy gives โ€” without sitting down with dense or ancient books. If you've ever wanted to think more clearly, lead more calmly, act more decisively, and actually remember what you've learned โ€” Sharp is built for you. Whether you're into stoicism, strategy, discipline, mindset, productivity, or self-improvement, Sharp meets you with one idea at a time. WHAT'S INSIDE A library of 1,000 cards drawn from the timeless works on strategy, discipline, focus, persuasion, resilience, leadership, and clear thinking โ€” the ideas that have guided sharp minds for centuries, rewritten for the way you live now. Topics covered: โ€ข Strategy & decision-making โ€ข Discipline & self-mastery โ€ข Patience & emotional control โ€ข Influence & persuasion โ€ข Resilience & handling adversity โ€ข Focus & cutting through noise โ€ข Confidence & clear thinking Start free with a generous set of cards. A real, complete daily ritual โ€” not a crippled demo. At a few cards a day, you'll have weeks of wisdom before you hit the wall. When you're ready for everything, unlock the full library with a single one-time purchase. SHARP PRO โ€” ONE-TIME, YOURS FOREVER โ€ข All 1,000 cards, plus every card we add next โ€ข No subscription, ever โ€” one payment, yours for life โ€ข Unlimited saves for the ideas you want to return to Your data stays on your device. Sharp has no accounts and collects no personal data โ€” your purchase is handled securely by Apple. Think and act wiser. One card a day.

Screenshots

Cube Guide4 screens
Sharp4 screens

Verdict

The call

The clearest difference is in-app purchases: Cube Guide at none against Sharp's 1. Cube Guide also leads on device support (3 vs 1). Sharp's advantage is ads (none vs shown). On price and iOS requirement 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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Sharp sells 1 one-off in-app purchase. Cube Guide asks for nothing beyond the download.

Scorecard3 real differences ยท 3 level
Cube Guide versus Sharp: the parameters behind the verdict, then further details
ParameterCube GuideSharp
PriceFreeFree
Update frequencyโ€”Every 3 days
AdsYesNo โ€” better
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPod โ€” betteriPhone
Requires iOS15.6 โ€” better16.4
Further details โ€” not scored
Size36 MB102 MB
Age rating9+4+
DeveloperPavel PakhmutovMark Matute

In-app purchases

None

Cube Guide

No in-app purchases

1 purchases

Sharp

One-time1
  • Sharp Pro Lifetime$4.99

Questions

Is Cube Guide free?
Cube Guide is free to download, with no in-app purchases.
Is Sharp free?
Sharp is free to download, with in-app purchases available.
Do Cube Guide or Sharp have ads?
Cube Guide shows ads; Sharp does not.

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