Comparison

Calculator!! vs Octo Browser

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

Head to head
About

Calculator!!

This advanced calculator offers a comprehensive history of your calculations and supports complex functions like fraction manipulation, angle conversions, and equation solving. It also includes specialized tools for engineers and a dice roller.

Highlights
  • Calculation history
  • Fraction manipulation
  • Angle conversions (degrees, minutes, seconds)
  • Permutation, combination, LCM, GCD
  • Quadratic and linear equation solver
  • Coordinate conversion
  • Dice roller
Features
Read full description

Calculator!! has the following additional functionality compared with most available calculators: - Shows the expression as you enter and keeps a history of your calculations (Swipe up on the screen to access the history.) - Capability of performing fraction manipulations and converting between different formats (proper, improper, and mixed fractions) and seamless integration of fraction, integer, and decimal manipulations. - Capability of inputting degrees, minutes, and seconds for angles and converting between degrees-minutes-seconds format and decimal format. - Capability of calculating permutation, combination, Least Common Multiple (LCM), and Greatest Common Divisor (GCD). - Quadratic and system of two linear equations solver - Rectangular to polar and polar to rectangular coordinate conversion (extremely useful for phasor calculations for electrical engineers) - Throws a set of dice (choice of 1 die to 4 dice) - Backspace to delete last digit entered. - Tip Calculator - Geometry Calculator - The left pane scrolls to reveal more functionality without a need to switch modes. The digits and most common operations are always visible and the less common operations can be revealed by scrolling the left half of the screen. - Sinusoidal functions can be calculated for angles in units of degrees, radians, or gradians. - Showing the content of memory on MR button, as long as it fits. Calculator!! is an ongoing project and we are working on more features and functions to be added to every update of the app. You are going to love the simplicity of the user interface and you will get used to the extra functionality added to this product. Please do not hesitate to contact us for any questions, comments, to report any bugs, or to suggest additional functions you would like to see in the upcoming updates.

About

Octo Browser

This private browser allows you to create separate profiles for different online activities, ensuring your cookies, cache, and history remain isolated. Easily switch between work, personal, or research contexts without data leakage.

Highlights
  • Independent browser profiles
  • Isolated cookies and cache
  • Separate browsing history
  • Customizable browser identification
  • Proxy support (HTTP, HTTPS, SOCKS5)
  • Instant profile switching
Features
Read full description

A private browser built on independent profiles. Create browser profiles for every context you need - work, personal, research, or anything else. Each profile is its own world, with its own cookies, cache, history, and settings. Switch between them in one tap. Nothing leaks between them. PROFILES THAT STAY SEPARATE Every browser profile is its own container. Cookies and sessions don't mix, and data from one profile never shows up in another. - Create profiles in seconds - Each profile has its own cookies, storage, and session - Instant switching from the main screen - Separate browser history POWERFUL BROWSING TOOLS Every profile comes with flexible settings you fully control: - Browser identification, language, timezone, and regional settings - Proxy (HTTP, HTTPS, SOCKS5) MADE FOR EVERYDAY USE - Keep work and personal browsing fully separated - Stay signed in to different sites across different profiles

Screenshots

Calculator!!4 screens
Octo Browser4 screens

Verdict

The call

The clearest difference is price: Octo Browser at Free against Calculator!!'s $0.99. Octo Browser also leads on update cadence (every 5 days vs every 10 months). Calculator!!'s advantage is rating (4.4 vs 3.6) and review sentiment (75% vs 53%). On ratings volume, ads, in-app purchases 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

Octo Browser is free to download; Calculator!! costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Calculator!! holds the better App Store score, 4.4 against 3.6. Both are backed by a comparable volume of ratings — 56 and 20 respectively. Written reviews point the same way: 75% of Calculator!!'s written reviews are positive against 53% of Octo Browser's.

UpkeepUpdate frequency

Calculator!! ships an update every 10 months, Octo Browser every 5 days. Both last shipped on October 14, 2026.

Scorecard6 real differences · 4 level
Calculator!! versus Octo Browser: the parameters behind the verdict, then further details
ParameterCalculator!!Octo Browser
Price$0.99Free — better
Rating4.4 (56 ratings) — better3.6 (20 ratings)
Positive reviews75.0% of reviews — better53.3% of reviews
Number of ratings56 — better20
Update frequencyEvery 10 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS10.0 — better17.0
Further details — not scored
Size12 MB16 MB
Age rating4+17+
DeveloperDogaheBLACKBIRD SECURE BROWSING LTD

Customer experience

Calculator!!

All ratings56 ratings
Positive85.7%
Neutral5.4%
Negative8.9%
Written reviews8 reviews
Positive75.0%
Neutral12.5%
Negative12.5%

Octo Browser

All ratings20 ratings
Positive55.0%
Neutral25.0%
Negative20.0%
Written reviews15 reviews
Positive53.3%
Neutral26.7%
Negative20.0%

In-app purchases

None

Calculator!!

No in-app purchases

None

Octo Browser

No in-app purchases

Questions

Is Calculator!! free?
Calculator!! costs $0.99, with no in-app purchases.
Is Octo Browser free?
Octo Browser is free to download, with no in-app purchases.
Which has better reviews, Calculator!! or Octo Browser?
Calculator!! is rated higher. Calculator!! averages 4.4 out of 5 from 56 ratings, while Octo Browser averages 3.6 from 20 ratings.
Do Calculator!! or Octo Browser have ads?
Neither Calculator!! nor Octo Browser shows ads.
Which is updated more often, Calculator!! or Octo Browser?
Calculator!! ships an update every 10 months, and Octo Browser every 5 days. Most recently, Calculator!! was updated on October 14, 2026 and Octo Browser on October 14, 2026.

Other comparisons