Comparison

Calculator vs Summa

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 comprehensive suite of 15 calculators for everyday and scientific needs. Perform basic arithmetic, complex scientific calculations, and specialized conversions for units, taxes, loans, health, and more with accurate results.

Highlights
  • Classic and Scientific Calculations
  • Unit Converter (length, area, volume, etc.)
  • Sales Tax, Tip, and Discount Calculators
  • Loan and Savings Calculators
  • Health (BMI, BMR) and Ovulation Calculators
  • GPA and Unit Price Calculators
  • Fuel Cost and Efficiency Calculators
Features
Read full description

Do you calculate manually? Bored with your in-built Calculator App? Download this Calculator app and do math calculations easily. With this app, you can smoothly enter your data and get results quickly. With the best calculator app around, relax and do your calculations accurately. This all in one calculator app is going to be your go-to choice for everyday use. Apart from doing fundamental arithmetic operations like addition, subtraction, multiplication, and division, you can do scientific calculations too. If you are looking for a simple calculator along with a scientific calculator, which gives accurate results up to 10 decimal places, this app is among the best calculator app for you. Get the most out of your Unit converter by quickly and easily converting between multiple units of measurement. This unit converter is the perfect tool for converting between units of length, area, volume, speed, temperature, mass, pressure, and more. With a simple and intuitive design, it's easy to use and makes converting units a breeze. * List of calculators that you get in this app: - Classic Calculator: This calculator allows you to perform addition, subtraction, multiplication, and division as well as advanced mathematical calculations. - Scientific Calculator: Do advanced mathematical calculations like logarithmic & trigonometric functions easily. - Sales Tax calculator: Find out before-tax price and final or after-tax price. - Age calculator: Calculate age in years, months, days, or minutes! - Tip calculator: Learn how much you and your friends should leave for a tip, instantly! - Discount calculator: Save money by calculating discounts rapidly and accurately. - Fuel calculator: Enter travel distance, fuel efficiency, and fuel price to know how much your trip will cost. - Fuel Efficiency: Enter mileage before and after fueling to see how efficiently your car uses gas. - Savings calculator: Calculate the savings easily with the best savings calculator. - Loan Calculator: It helps to calculate the monthly payments, interest cost, and total amount to be repaid on a loan over a specified period of time. - Health Calculator: It will calculate the BMI based on height and weight, and BMR which represents the number of calories their body needs to function at rest. - Ovulation Calculator: Predicts fertility window by calculating the date of ovulation for tracking menstrual cycles and optimizing chances of conception. - GPA Calculator: Calculates Grade Point Average (GPA) based on inputted grades and credits for easy academic performance tracking. - Unit Price Calculator: Calculates unit price for comparison shopping by dividing total cost by quantity. - GST Calculator: It will help individuals or businesses determine the amount of GST payable on specific items. - Unit Converter: Easily convert any quantity from one unit into other: length, weight, temperature, speed, density, pressure, etc. It is very helpful during construction work. - World Time: Displays current time in different time zones around the world for easy global time tracking. - Numeral System: Converts numbers between different numeral systems (e.g., decimal, binary, hexadecimal) for easy numerical conversions. * Features: - Perform basic arithmetic (addition, subtraction, multiplication, division) - Add parentheses and math operators - Scientific Calculator including Logarithm, Integer, Radian etc. functions - View calculation history with the history log - Edit and correct data before calculating - Copy the calculated result to the clipboard for easy access - Option to choose from various themes - Easy to read numbers due to clear display format - Share calculations and results easily with others When you go for this calculator app download, not only do your calculations become easier and more accurate but also it helps save your precious time!

About

Summa

A clean, fast, and beautifully designed calculator for everyday math, scientific calculations, and quick conversions. Features live preview, history, favorites, and smart gestures for effortless and accurate calculations.

Highlights
  • Live preview of results
  • History and Favorites for calculations
  • Scientific functions (exponents, roots, trig)
  • Built-in unit and currency converter
  • Smart gestures for interaction
  • Multiple themes and icon options
Features
Read full description

Summa - Precision Made Simple is a clean, fast, and beautifully designed calculator for iPhone and iPad. Built for everyday math, scientific calculations, quick conversions, and everything in between, Summa makes calculating effortless, accurate, and genuinely enjoyable. With live preview, a fast history bar, and natural gestures, Summa helps you move quickly without losing context. Results appear as you type, past calculations stay within reach, and Favorites make it easy to save the numbers you return to most. Powerful features, simply presented: - Live preview - see results instantly as you type - History and Favorites - revisit, reuse, and save important calculations - Exponents and roots - x^2, x^y, square root, and y-th root - Trigonometry - sin, cos, tan, and inverse arc functions - Degree and radian support - easily switch between DEG and RAD - Mathematical constants - π and e - Logarithmic functions - ln for natural logarithms - Smart gestures - swipe, tap, and interact naturally A calculator with a capable converter: Summa includes built-in conversions for money, temperature, length, weight, volume, energy, area, and data size. Convert currencies by name or country, work with fiat and crypto rates, or quickly switch between everyday units without leaving the app. For market data, Summa offers flexible refresh behavior with adjustable fiat and crypto cache timing. Relay mode can route fiat and crypto market refreshes through Studio Elytra15’s cache for a more private path. Designed to feel personal: - Multiple themes, including light, dark, and crafted color themes - Alternate Home Screen icons - A calm, polished interface for iPhone and iPad - Completely free - no ads, no in-app purchases, and no tracking Whether you’re at home, at work, in class, or on the go, Summa is your reliable, elegant calculator companion. Precise math, beautifully simple.

Screenshots

Calculator4 screens
Summa4 screens

Verdict

The call

The clearest difference is review sentiment: Summa at 100% against Calculator's 33%. Summa also leads on rating (5.0 vs 4.3) and in-app purchases (none vs 1). Calculator's advantage is ratings volume (20 vs 1) and iOS requirement (15.0 vs 17.0). On price 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. Calculator sells 1 one-off in-app purchase. Summa asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Summa holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Calculator has 20 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 33% of Calculator's written reviews are positive against 100% of Summa's.

UpkeepUpdate frequency

Calculator ships an update every 3 months, Summa every 5 weeks. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

Scorecard8 real differences · 2 level
Calculator versus Summa: the parameters behind the verdict, then further details
ParameterCalculatorSumma
PriceFreeFree
Rating4.3 (20 ratings)5.0 (1 ratings) — better
Positive reviews33.3% of reviews100.0% of reviews — better
Number of ratings20 — better1
Update frequencyEvery 3 monthsEvery 5 weeks — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size33 MB24 MB
Age rating4+4+
DeveloperRV AppStudios LLCVille Scholin

Customer experience

Calculator

All ratings20 ratings
Positive80.0%
Neutral5.0%
Negative15.0%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

Summa

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Calculator

One-time1
  • Remove Ads$2.99
None

Summa

No in-app purchases

Questions

Is Calculator free?
Calculator is free to download, with in-app purchases available.
Is Summa free?
Summa is free to download, with no in-app purchases.
Which has better reviews, Calculator or Summa?
Summa is rated higher. Calculator averages 4.3 out of 5 from 20 ratings, while Summa averages 5.0 from 1 ratings.
Do Calculator or Summa have ads?
Calculator shows ads; Summa does not.
Which is updated more often, Calculator or Summa?
Calculator ships an update every 3 months, and Summa every 5 weeks. Most recently, Calculator was updated on November 7, 2026 and Summa on November 5, 2026.

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