# iCalculator vs Stamina Timer

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.

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.

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.

## The numbers

| Metric | iCalculator | Stamina Timer |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/icalculator-keyboard-calc/id1176527512/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 76.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 22 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nan Chao](https://appshunter.io/developer/965680403) | [KANA NISHI](https://appshunter.io/developer/1253410086) |

## What reviewers say

### iCalculator

[App page](https://appshunter.io/ios/app/icalculator-keyboard-calc/id1176527512)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.49 | per month |


### Stamina Timer

[App page](https://appshunter.io/ios/app/stamina-timer/id1525656674)

**In-app purchases:** none


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*