# Smooth Countdown vs Water Fill Timer

The clearest difference is price: Water Fill Timer at Free against Smooth Countdown's $0.99. Water Fill Timer also leads on update cadence (every 4 weeks vs every 21 months). Smooth Countdown's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Water Fill Timer is free to download; Smooth Countdown costs $0.99 up front. Water Fill Timer sells 1 one-off in-app purchase. Smooth Countdown asks for nothing beyond the download.

Smooth Countdown ships an update every 21 months, Water Fill Timer every 4 weeks. The most recent releases landed on October 4, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Smooth Countdown | Water Fill Timer |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 21 months | **Every 4 weeks** |
| Size | 1 MB | 35 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Piet Jonas](https://appshunter.io/developer/288060167) | [akira ohmachi](https://appshunter.io/developer/1338624340) |

## What reviewers say

### Smooth Countdown

[App page](https://appshunter.io/ios/app/smooth-countdown/id485337187)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Water Fill Timer

[App page](https://appshunter.io/ios/app/water-fill-timer/id6759228743)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Smooth Countdown free?

Smooth Countdown costs $0.99, with no in-app purchases.

### Is Water Fill Timer free?

Water Fill Timer is free to download, with in-app purchases available.

### Do Smooth Countdown or Water Fill Timer have ads?

Water Fill Timer shows ads; Smooth Countdown does not.

### Which is updated more often, Smooth Countdown or Water Fill Timer?

Smooth Countdown ships an update every 21 months, and Water Fill Timer every 4 weeks. Most recently, Smooth Countdown was updated on October 4, 2026 and Water Fill Timer on October 2, 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.*