Comparison

Calculator Sharp vs Must Ring

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

Head to head
About

Calculator Sharp

This calculator app offers ultra-high precision with up to 37 digits of accuracy. It supports a wide range of complex mathematical functions, including trigonometric, logarithmic, and integral operations, along with step-by-step calculation display and undo/redo functionality.

Highlights
  • Ultra-high precision (37 digits)
  • Supports complex mathematical operations
  • Displays calculation steps
  • Undo and redo functionality
  • Multiple number base conversions
  • WYSIWYG interface
Features
Read full description

Calculator Sharp is a feature-rich, simple and practical operation of text calculator. Calculator tool Features : Ultra-high-precision, The accuracy of commonly calculator is 15, But Calculator Sharp can reach 37 accuracy. WYSIWYG glance. Easy to use, low threshold, for the majority of students and staff to use Support displays the calculated step function Support undo and anti- undo function Support flexible and complex calculations expressions. Specific Features * Support for the basic arithmetic operators * Support exponentiation * Support for radical sign operation * Support for logarithm operations * Support factorial and double factorial operator * Support Permutation and combination * Support trigonometric and inverse trigonometric * Support hyperbolic functions and inverse hyperbolic functions * Support for sum method and average method * Support for the maximum and minimum approach * Support for the greatest common divisor and least common multiple * Support for remainder * Supports integer interception , rounding up and rounding down to rounding methods. * Support random number and range of random numbers * Support summation (Σ) and quadrature (Π) op * Support definite integral (∫) operation * Support convert degrees to radians and radians to degrees operator * Support for binary, octal, decimal, hexadecimal conversion between. * Support degrees (DEG) and radians (RAD) two calculation modes * Support rounded to the decimal digits function * Supports Undo and anti-undo function. * Support the cursor forward and backward functions * Support clear and delete the previous character feature. * Support slide down keyboard and display the calculation steps function. Calculator Sharp for OS X:https://itunes.apple.com/us/app/calc-sharp/id888324648?ls=1&mt=12

About

Must Ring

Features
Read full description

Must Ring is for the handful of things that cannot be missed — medication, picking someone up, the one task that has to happen today. Not a to-do list. Not a habit tracker. Just the few alarms that have to land, and an honest record of whether they did. RINGS THROUGH SILENT AND FOCUS Built on Apple's AlarmKit, so it rings full-screen like the system alarm — Silent on, any Focus mode, after the app is closed, after a restart. Two buttons on the Lock Screen: Done, or Snooze. IF NOBODY ANSWERS, SOMEONE GETS TOLD Set a delay. If the alarm still isn't confirmed after it, Must Ring sends a message to the contact you chose — so a missed dose doesn't pass in silence. You decide what they see. EVERY RING LEAVES A TRACE Done, done after snooze, skipped, unconfirmed, never delivered — each one is written down with its time and where you answered it (Lock Screen, widget or in the app). You can always tell "I forgot" apart from "it never rang". TEN TEMPLATES, THREE FIELDS Medication, meeting, pickup, errand, birthday, anniversary and more. Pick one, set the time, set the repeat. Lead time from 5 minutes up to a week. IN CHINA: STATUTORY WORKDAYS A work alarm can follow the official holiday calendar — it rings on make-up workdays and stays quiet on public holidays. A WIDGET THAT ANSWERS THE QUESTION What's next, how long is left, how today is going — on the Home Screen, without opening anything. PRIVATE BY DEFAULT Everything stays on your iPhone. No account, no sign-in, no server, no profiling. FREE TO START Same-day alarms always work, and so does the basic record — free, no account. A one-time purchase unlocks unlimited alarms, the template pack, escalation to a contact and full export. No subscription. Must Ring does not provide medical advice and is not a medical device. Always follow your prescriber's instructions.

Screenshots

Calculator Sharp2 screens
Must Ring4 screens

Verdict

The call

The clearest difference is in-app purchases: Calculator Sharp at none against Must Ring's 1. Calculator Sharp also leads on device support (3 vs 1) and iOS requirement (12.0 vs 26.1). Must Ring's advantage is ads (none vs shown) and update cadence (fortnightly vs every 5 months). On price 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. Must Ring sells 1 one-off in-app purchase. Calculator Sharp asks for nothing beyond the download.

UpkeepUpdate frequency

Calculator Sharp ships an update every 5 months, Must Ring fortnightly. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 5 level
Calculator Sharp versus Must Ring: the parameters behind the verdict, then further details
ParameterCalculator SharpMust Ring
PriceFreeFree
Rating5.0 (5 ratings) — better—
Positive reviews93.8% of reviews—
Number of ratings5 — better—
Update frequencyEvery 5 monthsFortnightly — better
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS12.0 — better26.1
Further details — not scored
Size31 MB12 MB
Age rating4+4+
Developer锦文 游大胜 纪

In-app purchases

None

Calculator Sharp

No in-app purchases

1 purchases

Must Ring

One-time1
  • Must Ring Unlock$14.99

Questions

Is Calculator Sharp free?
Calculator Sharp is free to download, with no in-app purchases.
Is Must Ring free?
Must Ring is free to download, with in-app purchases available.
Do Calculator Sharp or Must Ring have ads?
Calculator Sharp shows ads; Must Ring does not.
Which is updated more often, Calculator Sharp or Must Ring?
Calculator Sharp ships an update every 5 months, and Must Ring fortnightly. Most recently, Calculator Sharp was updated on November 6, 2026 and Must Ring on October 31, 2026.

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