Comparison

Calculator⁼ vs Hourglass Timer

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

Head to head
About

Calculator⁼

This app offers a clean and intuitive interface for both basic arithmetic and advanced scientific calculations. It includes a history tape to review past computations and supports various mathematical operations, making it suitable for everyday use and complex problem-solving.

Highlights
  • Basic & Scientific Calculator
  • Live Currency Converter
  • History Tape
  • Equation Edit Function
  • Degrees or Radians Calculation
  • Memory Banks
Features
Read full description

Calculator is a clean, easy-to-use calculator app for everyday math and more. It handles basic calculations and scientific functions when you need them and keeps a history of your past results so you can quickly go back and check or reuse them. With its classic design, it feels familiar and straightforward—perfect for quick sums at work, school, or home. AVAILABLE FOR FREE • Basic & Scientific Calculator • Great Visibility; Big buttons for easy calculations • Live Currency Converter; get exchange rate prices • History Tape; Track all calculations, taxes, and expenses • Equation edit function • Calculate with Degrees or Radians • Memory Banks • Choose your Decimal Notation • Set the Number of Decimals • Available in 12 languages • Made for iPad & iPhone • Support Split View & Dark Mode BASIC AND SCIENTIFIC Rotate your device to access all scientific buttons. Or if you prefer calculating in portrait mode, simply swipe left. YOUR EXPERIENCE IS IMPORTANT TO US! As your experience is important to us, we’re happy with your feedback, questions, and suggestions. Please share any support as our team is always ready to help via support@impalastudios.com Mathematical Operations Addition, Subtraction, Division, Multiplication, Percentages, Square, Cubic Exponent, Nth Exponent, Square Root, Cubic Root, Nth Root, Engineering Exponent, Factorial, Power of Two, Power of Ten, Power of E, Natural Logarithm, Common Logarithm, Binary Logarithm, Sine, Cosine, Tangent, Arc Sine, Arc Cosine, Arc Tangent, Hyperbolic Sine, Hyperbolic Cosine, Hyperbolic Tangent, Hyperbolic ArcSine, Hyperbolic Arc Cosine, Hyperbolic ArcTangent, Multiplicative Inverse, Random Number Input LOVING CALCULATOR? Please show your support by rating us! Thank you. Calculator (C) 2011 Impala Studios Terms & Conditions: https://impalastudios.com/terms Privacy Policy: https://impalastudios.com/privacy

About

Hourglass Timer

Read full description

Take a small break between study or work sessions. Set a 1–60 minute hourglass, watch the material flow, and explore it with your fingers. Keep the app open to follow the countdown and remaining time. Touch, drag, tilt, and shake to explore each material's motion and haptic response. INCLUDED • Silky sand • Choose 1–60 minutes in Settings • Before starting, hold the upper chamber to add one minute at a time • Start, pause, resume, and reset • No ads, account registration, or tracking TACTILE MATERIAL PACK — ONE-TIME IN-APP PURCHASE Add five materials together: fluttering Gold Leaf, fluffy Cloud Puffs, popping Bubbles, squishy Jelly, and rolling Pearls. Restore Purchases is included. The app interface is available in Japanese and English. Haptic and motion responses vary by device.

Screenshots

Calculator⁼4 screens
Hourglass Timer4 screens

Verdict

The call

The clearest difference is price: Calculator⁼ at Free against Hourglass Timer's $0.99. Calculator⁼ also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). Hourglass Timer's advantage is in-app purchases (none vs 8) and ads (none vs shown). On update cadence 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

Calculator⁼ is free to download; Hourglass Timer costs $0.99 up front. Calculator⁼ sells 8 in-app purchases, starting at $0.49 per 7 days. Hourglass Timer asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.

Scorecard5 real differences · 5 level
Calculator⁼ versus Hourglass Timer: the parameters behind the verdict, then further details
ParameterCalculator⁼Hourglass Timer
PriceFree — better$0.99
Rating4.6 (359K ratings) — better—
Positive reviews35.7% of reviews—
Number of ratings359K — better—
Update frequencyMonthlyMonthly
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size159 MB4 MB
Age rating4+4+
DeveloperImpala StudiosSMART BIT K.K

Bugs and requests

Calculator⁼

Reported bugs

3 issues
  • History not always showing all entries
  • Ads covering up parts of the screen
  • Inability to close full-screen ads

Requested features

4 requests
  • Add fraction button
  • Option to clear calculation history
  • Ability to copy/paste results
  • Customizable layout and themes

Hourglass Timer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Calculator⁼

Subscriptions6
  • Weekly Premium Access3 Days trial$0.497 Days
  • Monthly full access3 Days trial$1.991 Month
  • Weekly Premium Access3 Days trial$1.997 Days
Show 3 more
  • Limited Time Offer$4.991 Year
  • Premium Yearly3 Days trial$5.991 Year
  • Annual Premium Access$9.991 Year
One-time2
  • Retro Theme Calculator'$0.99
  • Lifetime Full Access$14.99
None

Hourglass Timer

No in-app purchases

Questions

Is Calculator⁼ free?
Calculator⁼ is free to download, with in-app purchases available.
Is Hourglass Timer free?
Hourglass Timer costs $0.99, with no in-app purchases.
Do Calculator⁼ or Hourglass Timer have ads?
Calculator⁼ shows ads; Hourglass Timer does not.
Which is updated more often, Calculator⁼ or Hourglass Timer?
Calculator⁼ ships an update monthly, and Hourglass Timer monthly. Most recently, Calculator⁼ was updated on October 21, 2026 and Hourglass Timer on October 18, 2026.

Other comparisons