Comparison

Colinear vs Calculator Keyboard

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

Head to head
About

Colinear

Manage and track your issues natively on mobile. This app links to your Linear workspace, allowing you to monitor ongoing tasks and see what needs to be completed. It offers a streamlined experience for project management on iOS devices.

Highlights
  • Link Linear workspace
  • Track ongoing issues
  • Monitor roadmap
  • Native iOS features
  • Project management on mobile
Features
Read full description

Manage and track your issues natively using Colinear. Link your Linear workspace in this very easy to use application. Change the way you work on mobile and keep track of all your ongoing issues and see what is still to be completed. Colinear helps you manage your Linear workspace in almost every way the MacOS application does, except this is fine tuned to support all the iOS native capabilities and features. Monitor what is on the roadmap in the app itself as well as leave some feedback on what you would like to see added to this application. Colinear is a project that I decided to work on, as an attempt to make a "to-do" application, however it rather became more apparent to rather use Linear's API to be able to interact with an already existing issue management application. Thanks to the powerful and well documented API from Linear, this app was created to take advantage of their API and make the "to-do" app a reality. Future features that are on the horizon: * Push notifications * Widgets * Apple Watch Support * iPad Support I am the sole developer of the application, so these changes will take time, but your support will be greatly appreciated. Please leave any constructive feedback in the "Workspace" tab of the application, it will be much appreciated! Please note: This app was not created or affiliated with Linear. It was solely created by myself. Privacy Policy: https://sites.google.com/view/colinear-privacy-policy/home Terms of Use: https://sites.google.com/view/colinear-terms-of-use/home

About

Calculator Keyboard

Read full description

Calculate without switching apps. A calculator built right into your keyboard — works everywhere. Split bills, calculate tips, and insert results instantly. Tired of switching apps back and forth? Calkey is a calculator built right into your keyboard. Whether you're in Messages, Notes, Safari, or any other app, you can calculate on the spot—without ever leaving your keyboard. Results insert with a single tap. ■ Perfect for: • Splitting the bill  Calculate "125 ÷ 4" right in your group chat and send it instantly. • Shopping abroad  Convert currency and paste the result straight into your notes. • Quick calculations  No more hunting for the calculator app and switching away from what you're doing. ■ Key Features • Built into your keyboard  Access it anytime, anywhere. • One-tap input  Tap any result to insert it as text. • Formula input  Insert the full equation too. Show your work with formats like "1000 + 500 = 1500." • Customizable  Light/Dark mode support and adjustable keyboard height. • Works offline  Your calculations stay private—nothing is sent externally. Make your iPhone keyboard smarter. Download Calkey now and experience effortless calculations.

Screenshots

Colinear4 screens
Calculator Keyboard4 screens

Verdict

The call

The clearest difference is in-app purchases: Colinear at none against Calculator Keyboard's 1. Calculator Keyboard's advantage is update cadence (weekly vs every 3 weeks). 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. Calculator Keyboard sells 1 one-off in-app purchase. Colinear asks for nothing beyond the download.

UpkeepUpdate frequency

Colinear ships an update every 3 weeks, Calculator Keyboard weekly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

Scorecard2 real differences · 7 level
Colinear versus Calculator Keyboard: the parameters behind the verdict, then further details
ParameterColinearCalculator Keyboard
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS18.017.6 — better
Further details — not scored
Size7 MB1 MB
Age rating4+4+
DeveloperJoe GuedesRyunosuke Karimata

In-app purchases

None

Colinear

No in-app purchases

1 purchases

Calculator Keyboard

One-time1
  • Pro Upgrade$2.99

Questions

Is Colinear free?
Colinear is free to download, with no in-app purchases.
Is Calculator Keyboard free?
Calculator Keyboard is free to download, with in-app purchases available.
Do Colinear or Calculator Keyboard have ads?
Neither Colinear nor Calculator Keyboard shows ads.
Which is updated more often, Colinear or Calculator Keyboard?
Colinear ships an update every 3 weeks, and Calculator Keyboard weekly. Most recently, Colinear was updated on November 3, 2026 and Calculator Keyboard on November 5, 2026.

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