Comparison

CMCalc vs Picpair

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

Head to head
About

CMCalc

This app emulates a classic 1980s computer math calculator, offering decimal arithmetic, binary conversions, and logic functions. It supports parentheses for complex calculations and includes modern features like copy/paste and landscape mode.

Highlights
  • Decimal arithmetic
  • Binary conversions (decimal, binary, octal, hexadecimal)
  • Binary logic functions
  • Operator grouping with parentheses
  • Hexadecimal input (A-F)
  • Copy and paste results/functions
  • Landscape mode
Features
Read full description

The CMCalc application is a replica of the Casio CM-100 Computer Math Calc solar powered calculator that was sold in the mid 1980’s. It performs simple decimal arithmetic and basic binary conversions (decimal - binary - octal - hexadecimal) and binary logic functions. While it is a standard infix calculator, it supports operator grouping with parentheses. For hexadecimal calculations, the input keys include A through F. CMCalc application performs all the same functions as the calculator, and has the same look as the original. There are a couple features that were not conceivable in the 1980’s on a calculator … such as the ability to copy and paste the results or the entered function, and a landscape mode for devices with 4 inch or larger screens. The face of the calculator can be viewed in two modes including a traditional application style, and a photo replica of the original calculator face.

About

Picpair

Easily compare two photos side-by-side, vertically, with a swipe, overlay, or slider. Save and share your combined image instantly. Designed for privacy with no accounts or tracking.

Highlights
  • Multiple comparison layouts
  • Side-by-side comparison
  • Swipe and overlay views
  • Adjustable transparency
  • Save and share combined images
  • Native iOS interface
  • Light and dark mode support
Features
Read full description

Picpair is the fastest way to compare two photos. Trying to choose between two nearly identical shots? Comparing a before and after? Lining up two options for a friend to vote on? Picpair makes it effortless. Add two photos, compare them in the layout that works for you, and save the combined result as a single image you can share anywhere. COMPARE YOUR WAY Switch instantly between five layouts to see your photos exactly how you want: - Side by Side: both photos next to each other for a direct, edge-to-edge comparison. - Vertical: one photo stacked above the other, great for tall shots and phone screens. - Swipe: full-screen photos you can swipe between to spot the tiny differences. - Overlay: both photos visible at once with adjustable transparency. - Slider: reveal the bottom photo by dragging a slider across the screen. ADD PHOTOS IN SECONDS Send two photos straight from the Photos app using the share sheet, or add them right inside Picpair with the built-in picker. SAVE AND SHARE Save the combined image to your photo library with a single tap and share it anywhere. DESIGNED FOR iOS Picpair was designed with a clean, native interface and features beautiful light and dark mode support. PRIVATE BY DESIGN No accounts. No sign-ups. No tracking. Free. Your photos stay on your device and are never uploaded anywhere.

Screenshots

CMCalc4 screens
Picpair4 screens

Verdict

The call

The clearest difference is review sentiment: Picpair at 100% against CMCalc's 67%. Picpair also leads on rating (5.0 vs 4.6) and update cadence (every 2 weeks vs every 45 months). CMCalc's advantage is ratings volume (7 vs 2) and iOS requirement (12.0 vs 18.0). On price, ads, in-app purchases and monetization model 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

Picpair holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 7 and 2 respectively. Written reviews point the same way: 67% of CMCalc's written reviews are positive against 100% of Picpair's.

UpkeepUpdate frequency

CMCalc ships an update every 45 months, Picpair every 2 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 5 level
CMCalc versus Picpair: the parameters behind the verdict, then further details
ParameterCMCalcPicpair
PriceFreeFree
Rating4.6 (7 ratings)5.0 (2 ratings) — better
Positive reviews66.7% of reviews100.0% of reviews — better
Number of ratings7 — better2
Update frequencyEvery 45 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPod — betteriPhone
Requires iOS12.0 — better18.0
Further details — not scored
Size4 MB2 MB
Age rating4+4+
DeveloperWilliam DavidWilliam Krakow

Customer experience

CMCalc

All ratings6 ratings
Positive83.3%
Neutral16.7%
Negative0.0%
Written reviews6 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

Picpair

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

CMCalc

No in-app purchases

None

Picpair

No in-app purchases

Questions

Is CMCalc free?
CMCalc is free to download, with no in-app purchases.
Is Picpair free?
Picpair is free to download, with no in-app purchases.
Which has better reviews, CMCalc or Picpair?
Picpair is rated higher. CMCalc averages 4.6 out of 5 from 7 ratings, while Picpair averages 5.0 from 2 ratings.
Do CMCalc or Picpair have ads?
Neither CMCalc nor Picpair shows ads.
Which is updated more often, CMCalc or Picpair?
CMCalc ships an update every 45 months, and Picpair every 2 weeks. Most recently, CMCalc was updated on November 3, 2026 and Picpair on October 31, 2026.

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