# UDS Mobile vs Calm Countdown Timer

The clearest difference is update cadence: Calm Countdown Timer at weekly against UDS Mobile's monthly. UDS Mobile's advantage is iOS requirement (13.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

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

UDS Mobile ships an update monthly, Calm Countdown Timer weekly. The most recent releases landed on October 4, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | UDS Mobile | Calm Countdown Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calm-countdown-timer/id6761927042/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | — | Free |
| Size | 25 MB | 15 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Appnova](https://appshunter.io/developer/1571976797) | [Shujaat Siddiqui](https://appshunter.io/developer/1892111658) |

## What reviewers say

### UDS Mobile

[App page](https://appshunter.io/ios/app/uds-mobile/id6478269376)

**Features:** macOS Compatibility, Apple Wallet

**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 UDS Mobile free?

UDS Mobile 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.

### Do UDS Mobile or Calm Countdown Timer have ads?

Neither UDS Mobile nor Calm Countdown Timer shows ads.

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

UDS Mobile ships an update monthly, and Calm Countdown Timer weekly. Most recently, UDS Mobile was updated on October 4, 2026 and Calm Countdown Timer on October 8, 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.*