Comparison

BIG CALCULATOR. vs CalcTabs

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

Head to head
About

BIG CALCULATOR.

This utility app offers a straightforward and visually clear calculator experience, ideal for users of all ages. Its large numbers and dark interface enhance readability, while landscape mode support on iPhones and iPads provides added convenience.

Highlights
  • Large numbers for easy viewing
  • Simple and easy-to-see interface
  • Landscape mode support
  • Dark UI for eye comfort
  • Suitable for all ages
Features
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A calculator you can actually see — and now hear. Big Calculator does four things — add, subtract, multiply and divide — with keys and digits large enough to read and to hit first time. Nothing else is on the screen. It was built for people who find the calculator that came with their phone too small: for cataracts, glaucoma and macular degeneration, and for anyone whose eyes are simply not what they were. BIG WHERE IT COUNTS • Keys that fill the screen, with room between them • A readout in large, heavy type — no thin, faint numbers • Hide the memory keys and every remaining button grows • Long sums stay readable, grouped the way your country writes them • Portrait or landscape, on iPhone and iPad IT READS THE ANSWER OUT LOUD Turn on VoiceOver and Big Calculator speaks each result the moment it is worked out, so you never have to hunt across the screen for the answer. • Every key says what it is — "Add", "Equals", "Memory add" — not "plus sign" • Divide by zero and it says so, in words • Switch the speaking off in Settings if you would rather it stayed quiet Most calculators leave a blind user to explore the screen and guess. This one tells you. THREE LOOKS — PICK WHAT SUITS YOUR EYES • Warm Paper — dark type on a bright, warm background. Easiest to read for most people. • Night — white on black at high contrast, for eyes that find bright screens painful. • Classic — the original look, with bolder type. The whole app repaints the moment you choose, so you see the difference before you commit. A DESK CALCULATOR ON YOUR PHONE • M+, M− and MRC memory keys, where you expect them • AC clears everything, C clears just the entry • A key press you can hear — or silence it in Settings IN YOUR LANGUAGE, WITH YOUR NUMBERS Available in 23 languages. The decimal point and the thousands separator follow your own country's convention, so the number on screen is written the way you write it — 1,234.56 or 1.234,56 or 1 234,56, whichever is yours. NOTHING ELSE No account. No sign-in. No cloud. Nothing to learn. Your sums stay on your phone. Big Calculator is free, supported by a single banner advert at the bottom of the screen. SUBSCRIPTION Big Calculator Plus — an optional auto-renewing subscription, one year in length. No ads, plus a bigger keypad and display with more room for your calculations. Payment is charged to your Apple Account when you confirm the purchase. It renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple Account settings. The price is shown before you confirm. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://developer-yl.github.io/big-calculator/privacy.html

About

CalcTabs

Features
Read full description

CalcTabs is a free offline calculator that allows having multiple multifunctional tabs. A tab is a separate calculator, current calculator tab types are: - Simple Calculator - Custom Formula This app works offline and remembers any changes to any tab to your device.

Screenshots

BIG CALCULATOR.4 screens
CalcTabs4 screens

Verdict

The call

The clearest difference is in-app purchases: CalcTabs at none against BIG CALCULATOR.'s 1. BIG CALCULATOR.'s advantage is update cadence (every 3 weeks vs every 37 months). On price, ads, device support and iOS requirement 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. BIG CALCULATOR. sells 1 in-app purchase, starting at $2.99 per year. CalcTabs asks for nothing beyond the download.

UpkeepUpdate frequency

BIG CALCULATOR. ships an update every 3 weeks, CalcTabs every 37 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
BIG CALCULATOR. versus CalcTabs: the parameters behind the verdict, then further details
ParameterBIG CALCULATOR.CalcTabs
PriceFreeFree
Rating4.6 (65 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings65 — better—
Update frequencyEvery 3 weeks — betterEvery 37 months
AdsYesYes
In-app purchasesYesNo — better
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size13 MB30 MB
Age rating4+4+
DeveloperAdysseusBlack Flame Digital LTD

In-app purchases

1 purchases

BIG CALCULATOR.

Subscriptions1
  • Big Calculator Plus$2.991 Year
None

CalcTabs

No in-app purchases

Questions

Is BIG CALCULATOR. free?
BIG CALCULATOR. is free to download, with in-app purchases available.
Is CalcTabs free?
CalcTabs is free to download, with no in-app purchases.
Do BIG CALCULATOR. or CalcTabs have ads?
Both BIG CALCULATOR. and CalcTabs show ads.
Which is updated more often, BIG CALCULATOR. or CalcTabs?
BIG CALCULATOR. ships an update every 3 weeks, and CalcTabs every 37 months. Most recently, BIG CALCULATOR. was updated on November 2, 2026 and CalcTabs on October 30, 2026.

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