Comparison

CalculatorRed vs Clock Stamp

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

Head to head
About

CalculatorRed

Features
Read full description

Introducing CalculatorRed – Your Go-To Calculator for iPad & iPhone: Unleash the power of simplicity with CalculatorRed, the ultimate calculator app designed specifically for your iPad and iPhone. Whether you're tackling homework, managing household finances, or calculating on-the-go, CalculatorRed provides a seamless and intuitive computing experience. Why Choose CalculatorRed? - Optimized for iPad: Enjoy calculations on a grand scale with our large, easy-to-read display that makes complex computations less daunting. Perfect for both professional and educational settings, our interface is designed to maximize productivity on your iPad’s expansive screen. - iPhone Friendly: Don't have your iPad at hand? No problem! CalculatorRed works flawlessly on your iPhone as well, maintaining clarity and ease of use on a smaller scale. It’s always there when you need it, right in your pocket. - Simple & Efficient: This no-frills calculator gets back to basics, offering you all the essential functions without any complicated extras. It’s user-friendly for all ages and skill levels. - Completely Free & Ad-Free: We believe in straightforward computing without distractions. That's why CalculatorRed is completely free to use with no ads. No interruptions, just uninterrupted calculating. Whether you’re a student, teacher, professional, or someone who just needs a quick and easy tool for everyday calculations, CalculatorRed is designed to meet your needs. Download CalculatorRed today and experience the simplest, most effective way to manage all your numerical tasks on your favorite devices!

About

Clock Stamp

This app displays multiple city time zones on a single, elegant clock face. It provides visual context for day, night, and weather in each location, aiding in travel planning and international communication.

Highlights
  • Multiple city time zones
  • Visual analog world clock
  • Local time difference display
  • Weather and day/night context
  • 12-hour and 24-hour modes
  • Light and dark appearance
Features
Read full description

Clock Stamp makes world time easy to read. See the time in several cities at once on one elegant dial, and check time differences, whether it's day or night, and the local weather at a glance. • Dial: every city sits on the dial, so time differences and daylight are clear at a glance • City search: search Apple Maps for cities and towns worldwide, and add as many as you like • Local Time: follows your location, or uses your phone's time zone • Weather: local weather at a glance, with backgrounds and weather effects that follow each city's time and weather • iPhone Duo: controls within reach of your thumb on both displays, and a live map of Earth showing day and night when it's open • 12/24-hour dial, Light/Dark appearance, Celsius/Fahrenheit, two text sizes • Six languages: English, 简体中文, Français, Italiano, 日本語, 한국어 • Supports VoiceOver and Reduce Motion Made for working across borders, remote meetings, planning trips, studying abroad, and keeping in touch with friends and family in other time zones.

Screenshots

CalculatorRed3 screens
Clock Stamp4 screens

Verdict

The call

The clearest difference is update cadence: Clock Stamp at every 2 days against CalculatorRed's every 4 weeks. CalculatorRed's advantage is iOS requirement (17.0 vs 26.2). On price, 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

CalculatorRed ships an update every 4 weeks, Clock Stamp every 2 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 7 level
CalculatorRed versus Clock Stamp: the parameters behind the verdict, then further details
ParameterCalculatorRedClock Stamp
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 4 weeksEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better26.2
Further details — not scored
Size1 MB4 MB
Age rating4+4+
DeveloperKodwerk Software Ltd.Zhicheng Chen

In-app purchases

None

CalculatorRed

No in-app purchases

None

Clock Stamp

No in-app purchases

Questions

Is CalculatorRed free?
CalculatorRed is free to download, with no in-app purchases.
Is Clock Stamp free?
Clock Stamp is free to download, with no in-app purchases.
Do CalculatorRed or Clock Stamp have ads?
Neither CalculatorRed nor Clock Stamp shows ads.
Which is updated more often, CalculatorRed or Clock Stamp?
CalculatorRed ships an update every 4 weeks, and Clock Stamp every 2 days. Most recently, CalculatorRed was updated on November 8, 2026 and Clock Stamp on October 31, 2026.

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