# Calculator83 vs Calm Countdown Timer

The clearest difference is update cadence: Calm Countdown Timer at weekly against Calculator83's every 20 months. Calculator83's advantage is iOS requirement (15.0 vs 17.6). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Calculator83 against 5.0 for Calm Countdown Timer. Both are backed by a comparable volume of ratings — 4 and 2 respectively.

Calculator83 ships an update every 20 months, Calm Countdown Timer weekly. The most recent releases landed on September 15, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Calculator83 | Calm Countdown Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/calculator83/id891194491/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/calm-countdown-timer/id6761927042/reviews) |
| Number of ratings | **4** | 2 |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Weekly** |
| Monetization | Free | Free |
| Size | 10 MB | 15 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Lyker Labs LLC](https://appshunter.io/developer/891194494) | [Shujaat Siddiqui](https://appshunter.io/developer/1892111658) |

## What reviewers say

### Calculator83

[App page](https://appshunter.io/ios/app/calculator83/id891194491)

A minimalist calculator app focused on simplicity and a clean workflow. It offers both basic and scientific modes, allowing users to perform calculations without complex settings. Get started quickly with this straightforward tool.

**Highlights:** Minimalist design, Clean workflow, Basic mode, Scientific mode, Easy to use

**Features:** macOS Compatibility

**In-app purchases:** none


### Calm Countdown Timer

[App page](https://appshunter.io/ios/app/calm-countdown-timer/id6761927042)

This app provides a simple, calming visual timer to help children understand time, improve focus, and manage transitions smoothly. Its friendly design and clear countdown display make routines predictable and less stressful for kids, including those with special needs.

**Highlights:** Visual countdown display, Friendly characters, One-tap presets, Distraction-free design, Supports children with ADHD/autism, Helps with transitions and routines

**In-app purchases:** none


## Frequently asked questions

### Is Calculator83 free?

Calculator83 is free to download, with no in-app purchases.

### Is Calm Countdown Timer free?

Calm Countdown Timer is free to download, with no in-app purchases.

### Which has better reviews, Calculator83 or Calm Countdown Timer?

Calculator83 and Calm Countdown Timer are both rated 5.0 out of 5 on the App Store, from 4 and 2 ratings respectively.

### Do Calculator83 or Calm Countdown Timer have ads?

Neither Calculator83 nor Calm Countdown Timer shows ads.

### Which is updated more often, Calculator83 or Calm Countdown Timer?

Calculator83 ships an update every 20 months, and Calm Countdown Timer weekly. Most recently, Calculator83 was updated on September 15, 2026 and Calm Countdown Timer on September 6, 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.*