Comparison

Citizen Calculator ⁺ vs Calo

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

Head to head
About

Citizen Calculator ⁺

This app emulates a CITIZEN calculator, perfect for everyday and business math. It handles basic operations, corrections, percentages, constants, and large numbers, displaying them in scientific notation when needed.

Highlights
  • Basic math operations
  • Check and correct functionality
  • Auto replay
  • Percent calculation
  • Constants calculation
  • Number formatting
  • Grand total (GT)
Features
Read full description

This app is a fully working emulator of CITIZEN calculator. This calculator is ideal for general and business purposes. Calculator Features:- * Basic math operations (addition, subtraction, multiplication, division) * Check and correct * Auto replay * Percent calculation * Constants calculation * Number formatting (Decimal and digit-grouping) as per device locale * Grand total (GT) You can use this calculator to work with very large numbers. Numbers having more than 12 digits are shown in scientific notation. Leave a review if you like this simple and easy to use calculator app. For any suggestions/queries/problems in the app? Write to us at rakeshapp4@gmail.com

About

Calo

This app offers a high-precision calculator with scientific functions and unit conversion. It allows users to save and search calculation history, add notes, and export results. Customize themes and sync across devices for a personalized experience.

Highlights
  • High-precision calculation engine
  • Scientific mode with advanced functions
  • Unit converter
  • Searchable calculation history
  • Save and reuse expressions
  • Export results (CSV, image)
  • Home Screen and Lock Screen widgets
Features
Read full description

Calo is a free, ad-free calculator for everyday math and deeper exploration. A clean keypad keeps quick calculations simple; switch to scientific mode when you need more. Calculate with confidence • A native high-precision engine keeps up to 40 significant digits in results. • See results as you type. Move the cursor to edit or paste an expression, and use a hardware keyboard on iPad. • Explore powers, roots, logarithms, trigonometry, factorials and more. Switch between degrees and radians. • Tap a result to cycle through rounded, full-precision, fraction (when available) and scientific formats. Use memory keys for multi-step work. Keep your work close • Search your calculation history, add notes, reuse an earlier expression, or export results as CSV or a receipt-style image. • Save expressions you use often and insert them with a tap. • See recent results in Home Screen and Lock Screen widgets. Open Calo from Control Center, or calculate and retrieve your latest result with Siri and Shortcuts. Make it yours with light and dark themes, accent colors, sounds, Chinese voice pronunciation, adjustable decimal places and optional iCloud sync.

Screenshots

Citizen Calculator ⁺4 screens
Calo4 screens

Verdict

The call

The clearest difference is rating: Calo at 4.7 against Citizen Calculator ⁺'s 4.2. Calo also leads on ads (none vs shown) and update cadence (every 5 days vs every 12 months). On price, in-app purchases, 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Calo holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 5 and 22 respectively.

UpkeepUpdate frequency

Citizen Calculator ⁺ ships an update every 12 months, Calo every 5 days. The most recent releases landed on November 3, 2026 and November 12, 2026 respectively.

Scorecard5 real differences · 5 level
Citizen Calculator ⁺ versus Calo: the parameters behind the verdict, then further details
ParameterCitizen Calculator ⁺Calo
PriceFreeFree
Rating4.2 (5 ratings)4.7 (22 ratings) — better
Positive reviews—95.0% of reviews
Number of ratings522 — better
Update frequencyEvery 12 monthsEvery 5 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better16.0
Further details — not scored
Size6 MB10 MB
Age rating4+4+
DeveloperRakesh BhadaniSpace-Time Transformation Technology Co., Ltd.

Customer experience

Citizen Calculator ⁺

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%

Calo

All ratings22 ratings
Positive90.9%
Neutral4.5%
Negative4.5%
Written reviews20 reviews
Positive95.0%
Neutral0.0%
Negative5.0%

In-app purchases

None

Citizen Calculator ⁺

No in-app purchases

None

Calo

No in-app purchases

Questions

Is Citizen Calculator ⁺ free?
Citizen Calculator ⁺ is free to download, with no in-app purchases.
Is Calo free?
Calo is free to download, with no in-app purchases.
Which has better reviews, Citizen Calculator ⁺ or Calo?
Calo is rated higher. Citizen Calculator ⁺ averages 4.2 out of 5 from 5 ratings, while Calo averages 4.7 from 22 ratings.
Do Citizen Calculator ⁺ or Calo have ads?
Citizen Calculator ⁺ shows ads; Calo does not.
Which is updated more often, Citizen Calculator ⁺ or Calo?
Citizen Calculator ⁺ ships an update every 12 months, and Calo every 5 days. Most recently, Citizen Calculator ⁺ was updated on November 3, 2026 and Calo on November 12, 2026.

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