Comparison

iCalculator vs Stamina Timer

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

Head to head
About

iCalculator

This app offers a powerful and intuitive calculator experience, featuring both basic and scientific functions. It calculates results instantly as you type and allows for easy editing and history management. Customize your experience with themes and integrate it seamlessly as a keyboard or Today Widget.

Highlights
  • Instant calculation without '=' button
  • Basic & Scientific Calculator
  • Fraction & Expression Calculator
  • History List with iCloud sync
  • Customizable themes
  • Keyboard extension for any app
  • Today Widget support
Features
Read full description

Award-winning calculator app for iPad and iPhone with no ads. Designed with simplicity, usability, and beauty in mind! Join millions of users by downloading iCalculator on your iPhone, or iPad. [QUICK START] * There is no "=" button in this calculator app. It will calculate and show the result as soon as the expression is updated. If you need the next calculation, please click "CE" button; if you want to edit the calculation, please click "Del" button. * Swipe up/down to hide/show the history records. * Swipe left and right to hide/show the scientific/math functions. [How to add a keyboard calculator] 1. Go to Settings > General > Keyboard. 2. Tap Keyboards, then do any of the following: Add a keyboard: Tap Add New Keyboard, then choose "iCalculator" from the list. 3. When the screen changes, touch "iCalculator" and "Allow full access". [How to add the Today Widget] 1. In Today View, scroll to the bottom. You should find an Edit button. Tap it. 2. A new Add Widgets screen appears with a list of widgets. There are two lists here. The first lists the active widgets in your Today View. Scroll down until you see the More Widgets section, which is the widgets not in your Today View. 3. Find the widget "iCalculator". Tap the “+” icon. The widget will move to the bottom of the list of active widgets above the More Widgets section. [FEATURES] • No push, no news, no ads, 6.5MB, booting under one second. * Basic & Scientific Calculator * Fraction & Expression Calculator * Calculate and show results instantly when the input is updated. * History List: all Calculations are Saved and can be Copied and Forwarded; hide and open with one simple click * Quick Equation Preview: Your current Equation is displayed below the result * Basic Calculation Buttons in Portrait view * Advanced Mathematical/Scientific Buttons in Landscape view * Equations are automatically saved to the History list, which syncs with iCloud. * Use the fraction key to do coherent fractional math. Calculate fractions: add, subtract, divide and multiply. * Full support for iPad Split Screen multi-tasking. * Install the iCaculator keyboard so you can calculate a question in any app. Tap the "Insert" button, and the answer is inserted in the text field. * Made a mistake? Tap the current equation to enter edit mode, where you can select characters, insert and delete. * Apply 16 beautiful themes, including new entrants Candy, Mint, Lava, and a “bright themes” set. * Use the Theme Creator to make your own bright and beautiful color scheme. Purchase service: ##Services support the developer by keep working on it and adding new features. If you do not subscribe to the service, it does not affect any features. ##The service is valid for one month and will be automatically renewed upon expiration ##Account will be charged for renewal within 24-hours before the end of the current period, and identify the cost of the renewal ##Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase Privacy Policy and Terms: http://www.ledego.com/apps/icalculator/privacy.html

About

Stamina Timer

Read full description

ゲームの時限回復するスタミナを管理、通知するアプリです。 ゲーム以外でもアイデア次第で色々なタイマーとして使えます。 ◆ できること ・複数のタイマーを作成できます ・スタミナのMax値、回復に必要な時間とどれだけ回復する毎に通知するかを柔軟に設定できます(もちろん、Maxになった時だけ通知するといったことも設定次第で行えます) ・通知を待たなくてもリスト画面で今現在のスタミナ値が一目で確認できます ・タイマーのOn/Off、並び順の変更もリスト画面で簡単操作! ・タイマー毎にアイコンを設定できるのでリスト画面で目的のタイマーが埋もれません ・設定したアイコンが通知時に表示されます ・タイマー毎のテーマカラーをカスタマイズできます ・リスト画面の背景色をカスタマイズできます

Screenshots

iCalculator4 screens
Stamina Timer3 screens

Verdict

The call

The clearest difference is price: Stamina Timer at Free against iCalculator's $1.99. Stamina Timer also leads on in-app purchases (none vs 1) and iOS requirement (11.0 vs 13.0). iCalculator's advantage is ads (none vs shown) and update cadence (every 9 days vs every 5 weeks). On 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

Stamina Timer is free to download; iCalculator costs $1.99 up front. iCalculator sells 1 in-app purchase, starting at $0.49 per month. Stamina Timer asks for nothing beyond the download.

UpkeepUpdate frequency

iCalculator ships an update every 9 days, Stamina Timer every 5 weeks. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.

Scorecard5 real differences · 5 level
iCalculator versus Stamina Timer: the parameters behind the verdict, then further details
ParameteriCalculatorStamina Timer
Price$1.99Free — better
Rating5.0 (3 ratings) — better—
Positive reviews76.2% of reviews—
Number of ratings3 — better—
Update frequencyEvery 9 days — betterEvery 5 weeks
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.011.0 — better
Further details — not scored
Size6 MB22 MB
Age rating4+4+
DeveloperNan ChaoKANA NISHI

In-app purchases

1 purchases

iCalculator

Subscriptions1
  • Monthly Subscription$0.491 Month
None

Stamina Timer

No in-app purchases

Questions

Is iCalculator free?
iCalculator costs $1.99, and also offers in-app purchases.
Is Stamina Timer free?
Stamina Timer is free to download, with no in-app purchases.
Do iCalculator or Stamina Timer have ads?
Stamina Timer shows ads; iCalculator does not.
Which is updated more often, iCalculator or Stamina Timer?
iCalculator ships an update every 9 days, and Stamina Timer every 5 weeks. Most recently, iCalculator was updated on October 15, 2026 and Stamina Timer on October 7, 2026.

Other comparisons