# Pool vs Event Countdown

The clearest difference is review sentiment: Event Countdown at 100% against Pool's 22%. Event Countdown also leads on price (Free vs $4.99) and rating (5.0 vs 4.2). Pool's advantage is in-app purchases (none vs 4) and ratings volume (629 vs 3). On ads there is nothing between them.

Event Countdown is free to download; Pool costs $4.99 up front. Event Countdown sells 4 in-app purchases, starting at $1.99 per 7 days. Pool asks for nothing beyond the download.

Event Countdown holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Pool has 629 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 22% of Pool's written reviews are positive against 100% of Event Countdown's.

Pool ships an update every 5 weeks, Event Countdown every 2 days. The most recent releases landed on October 13, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Pool | Event Countdown |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.2 (629 ratings)](https://appshunter.io/ios/app/pool-calculator/id412876581/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/event-countdown-tomoment/id6751402161/reviews)** |
| Number of ratings | **629** | 3 |
| Positive reviews | 21.8% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 17 MB | 35 MB |
| Requires iOS | **15.1** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Pool and Spa Resources, LLC](https://appshunter.io/developer/1358030201) | [Shivam Rishi](https://appshunter.io/developer/1647309857) |

## What reviewers say

### Pool

[App page](https://appshunter.io/ios/app/pool-calculator/id412876581)

This app simplifies swimming pool and hot tub chemistry maintenance by performing all necessary calculations. It provides clear instructions on chemical dosages to maintain balanced, clear water, eliminating the need for complex charts and formulas.

**Highlights:** Chemical dosage calculations, Pool volume calculation, Chemical effects analysis, Customizable chemical ranges, Offline functionality

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Useful pool chemistry calculator
- 🚀 Makes pool maintenance easy
- 👍 Provides chemical dosage recommendations
- 🔍 Helpful 'Effects' tool to understand chemical impacts

**What reviewers complain about**

- 🐛 Accuracy issues with certain chemical calculations
- 🔍 Confusing or outdated chemical names
- 🔍 Limited customization options
- 🐛 Crashes and compatibility issues with newer iOS versions

**Reported bugs**

- App crashes on launch for many users
- Keyboard issues preventing data entry
- Incorrect chemical effect information (e.g. soda ash)
- Volume calculation not updating properly

**Requested features**

- Ability to save and track test history
- Support for multiple pools/spas
- Metric-only unit support
- More detailed chemical dosage information (e.g. weight-based)


### Event Countdown

[App page](https://appshunter.io/ios/app/event-countdown-tomoment/id6751402161)

Transform any moment into a beautiful, living countdown experience on your home and lock screens. Track days until or since special events with customizable widgets and smart reminders. Share your countdowns as stunning images.

**Highlights:** Unlimited event countdowns, Home and lock screen widgets, Customizable card styles, Smart reminder notifications, Live lock screen countdown updates, Shareable countdown images, Offline functionality

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $1.99 | per 7 days |
| Monthly Subscription | $2.99 | per month |
| Lifetime Purchase Promo | $0.99 | one-time |
| Lifetime Purchase | $4.99 | one-time |


## Frequently asked questions

### Is Pool free?

Pool costs $4.99, with no in-app purchases.

### Is Event Countdown free?

Event Countdown is free to download, with in-app purchases available.

### Which has better reviews, Pool or Event Countdown?

Event Countdown is rated higher. Pool averages 4.2 out of 5 from 629 ratings, while Event Countdown averages 5.0 from 3 ratings.

### Do Pool or Event Countdown have ads?

Neither Pool nor Event Countdown shows ads.

### Which is updated more often, Pool or Event Countdown?

Pool ships an update every 5 weeks, and Event Countdown every 2 days. Most recently, Pool was updated on October 13, 2026 and Event Countdown on October 1, 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.*