Comparison

▸ Calculator + vs WattTimeIsIt?

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 12 calculators, including scientific, currency, unit, and finance functions. It features advanced modes, extensive formula support, and a user-friendly interface for all calculation needs.

Highlights
  • 12 specialized calculators
  • Over 800 formulas
  • Scientific, RPN, and String modes
  • Unit and currency conversion
  • Finance and date/time calculations
  • Equation solver and graphing
  • History and expression export
Features
Read full description

+ 800+ formulas in Formula Toolkit In-App + OVER 1 MILLION DOWNLOADS WORLDWIDE + Award Winning Calculator Since 2007 HiCalc Pro is an ultimate calculator and will make all your calculations become simpler than ever with 12 calculators: Basic, Scientific, Currency Converter, Unit Converter, Finance, Date - Time, Constants, Equation Solver, Statistics, Base conversion, Graph & Tip calculator. ► Noteworthy • Three calculating modes: STANDARD, STRING and RPN • Precision to 31 digits • BIG CALC in Portrait mode. • Comprehensive Date & Time calculator • Unit Converter contains 3,300 units in 113 categories • Currency converter with daily online update for 152 currencies • Extended Memory and Expression History supports • Intuitive interface • Export & send out expressions/history ► Features: • Multi-line LED with smart input for entering complicated expressions • Show expression as normal writing mode @ very useful for students • Advanced RPN mode with Stack viewer and functions: DROP, SWAP, ROLL, DEPTH, PICK, OVER, KEEP, LAST, CLEAR • Sending data from Ext-Memory & History list • Support 5 languages (English, French, German, Chinese & Vietnamese) ► Scientific calculator: • Basic fx: sin, cos, tan, sin-1, cos-1, tan-1, sinh, cosh, tanh, log, ln, sinh-1, cosh-1, tanh-1 … • Advanced fx: Random, nPr, nCr, Differential function, Evaluation function, Integration function, Root-Finder and Product function, Greatest Common Divisor, Least Common Multiple, Fibonacci function … • Complex numbers in STRING mode ► Unit Converter: a powerful and easy-to-use tool for converting over 3,300 units in 113 categories. • Special categories: Women and Girl's Clothing, Cooking, Electric Field, Density Traditional, Typography, UHF channel and frequency chart, Fuel Consumption … • Full text search for categories and units • Favorite & Recently used units • Update over the air ► Statistics calculator • 15 common functions: Σ(x), mean of X, AVD, SSD, SDV, C(n, k), Min, Max, GM... • 6 probability distribution functions: Binomial, Gamma, Gaussian, Geometric, Poisson, Rayleigh • Smart data input: data import from clipboard supported ► Graphing Calculator • Up to three graphs • Coordinate system movable • Zoom in/out ► Equation solver • Polynomial Equations (1st-4th) • N-simultaneous equations ► Base conversion • Full-featured base conversion ► Date & Time calculator • Date / Time difference: calculate duration between two dates. • Add/ Subtract: Add or subtract days, months and years of a given date to get a new date. • Events Countdown/up: Shows Time Remaining and Elapsed Time ► World Clock • Show date & time of any city in the World • Have 6 cool skins ► Finance calculator • Time Value of Money (NPER, RATE, PV, FV, PMT) • Mortgage & Loan Calculator • Finance functions: SLN, SYD, DB, NPV, IRR, NPER, RATE, PV, FV, PMT. ► Constants Library: • 1500 constants from Mathematics, Physics, Solar System and Element e.g: Avogadro number, Gravitational const, Stefan-Boltzmann Const, Speed of Light.

About

WattTimeIsIt?

Easily adjust cooking times for frozen meals based on your microwave's wattage. Avoid under or overcooking your food by converting standard instructions to match your specific appliance.

Highlights
  • Adjust cooking times for wattage differences
  • Prevent under/overcooking food
  • Works with various microwave wattages
  • Ensures perfectly cooked meals
  • Simple and easy to use tool
Features
Read full description

Have a powerful (or weaker) microwave than the "norm?" Annoyed that frozen dinner packages say, "Cook for 5 minutes on high (based on a 1100W microwave)," but your microwave is 1300W or 700W? This app is for you! WattTimeIsIt? is a simple tool that will ensure that you don't under/overcook your food, given a difference in wattage. Perfectly cooked food designed for your microwave wattage, not a test kitchen's microwave. Just ask WattTimeIsIt? and you're all set! **Remember to be safe and always check the temperature of your food before eating it.**

Screenshots

▸ Calculator +4 screens
WattTimeIsIt?4 screens

Verdict

The call

The clearest difference is in-app purchases: WattTimeIsIt? at none against ▸ Calculator +'s 4. WattTimeIsIt? also leads on price ($0.99 vs $1.99). ▸ Calculator +'s advantage is update cadence (every 6 weeks vs every 40 months) and review sentiment (75% vs 50%). On rating, ads 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

▸ Calculator + costs $1.99 and WattTimeIsIt? $0.99 up front. ▸ Calculator + sells 4 one-off in-app purchases. WattTimeIsIt? asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for ▸ Calculator + against 4.7 for WattTimeIsIt?. That said, the two scores are not equally well evidenced: ▸ Calculator + has 904 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 75% of ▸ Calculator +'s written reviews are positive against 50% of WattTimeIsIt?'s.

UpkeepUpdate frequency

▸ Calculator + ships an update every 6 weeks, WattTimeIsIt? every 40 months. The most recent releases landed on October 15, 2026 and October 3, 2026 respectively.

Scorecard7 real differences · 3 level
▸ Calculator + versus WattTimeIsIt?: the parameters behind the verdict, then further details
Parameter▸ Calculator +WattTimeIsIt?
Price$1.99$0.99 — better
Rating4.7 (904 ratings)4.7 (3 ratings)
Positive reviews75.1% of reviews — better50.0% of reviews
Number of ratings904 — better3
Update frequencyEvery 6 weeks — betterEvery 40 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS8.0 — better14.0
Further details — not scored
Size44 MB2 MB
Age rating4+4+
DeveloperPPCLINK SoftwareVisoft, Inc.

Customer experience

▸ Calculator +

All ratings904 ratings
Positive93.5%
Neutral2.8%
Negative3.8%
Written reviews281 reviews
Positive75.1%
Neutral7.5%
Negative17.4%

WattTimeIsIt?

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Bugs and requests

▸ Calculator +

Reported bugs

5 issues
  • Date/Time screen cutoff at bottom and missing keyboard icon
  • Currency exchange not working
  • Periodic Taple option of HiCalcac pro is not compatible eith iOs 10
  • Crashes in iOS 10
  • Gig to meg conversion is incorrect

Requested features

5 requests
  • Dark mode option
  • Advanced analytics dashboard
  • Landscape mode support
  • Equation solver for non-polynomials
  • Auto-display of graph coordinates

WattTimeIsIt?

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

▸ Calculator +

One-time4
  • Formula Toolkit$0.99
  • Periodic Table$0.99
  • UI Upgrade$0.99
Show 1 more
  • Biorhythm$0.99
None

WattTimeIsIt?

No in-app purchases

Questions

Is ▸ Calculator + free?
▸ Calculator + costs $1.99, and also offers in-app purchases.
Is WattTimeIsIt? free?
WattTimeIsIt? costs $0.99, with no in-app purchases.
Which has better reviews, ▸ Calculator + or WattTimeIsIt??
▸ Calculator + and WattTimeIsIt? are both rated 4.7 out of 5 on the App Store, from 904 and 3 ratings respectively.
Do ▸ Calculator + or WattTimeIsIt? have ads?
Neither ▸ Calculator + nor WattTimeIsIt? shows ads.
Which is updated more often, ▸ Calculator + or WattTimeIsIt??
▸ Calculator + ships an update every 6 weeks, and WattTimeIsIt? every 40 months. Most recently, ▸ Calculator + was updated on October 15, 2026 and WattTimeIsIt? on October 3, 2026.

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