# KOA Center vs Hydration Tracker

The clearest difference is in-app purchases: KOA Center at none against Hydration Tracker's 10. KOA Center also leads on ads (none vs shown) and iOS requirement (8.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Hydration Tracker sells 10 in-app purchases, starting at $0.99 per 7 days. KOA Center asks for nothing beyond the download.

KOA Center ships an update monthly, Hydration Tracker every 5 weeks. The most recent releases landed on January 4, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | KOA Center | Hydration Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (218 ratings)](https://appshunter.io/ios/app/hydration-tracker-water-pal/id1301879657/reviews)** |
| Number of ratings | — | **218** |
| Positive reviews | — | 69.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 59 MB | 131 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [MINDBODY, Incorporated](https://appshunter.io/developer/472317932) | [Loyal Health & Fitness, Inc.](https://appshunter.io/developer/1088263310) |

## What reviewers say

### KOA Center

[App page](https://appshunter.io/ios/app/koa-center/id1111278236)

**Features:** macOS Compatibility

**In-app purchases:** none


### Hydration Tracker

[App page](https://appshunter.io/ios/app/hydration-tracker-water-pal/id1301879657)

This app helps you monitor your daily water intake to improve health and energy. It calculates your personalized hydration needs based on various factors and sends friendly reminders to ensure you meet your goals. Log different drink types and view your progress graphically.

**Highlights:** Calculate required water intake, Set daily hydration goals, Receive timely alerts, Log drinking times and units, Track multiple drink types, View daily consumption graphs, Motivational freebies and tips

**Features:** Apple Watch app

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $0.99 | per 7 days |
| Weekly Trial | $0.99 | per 7 days |
| Water Balance Premium | $1.99 | per month |
| Monthly | $2.99 | per month |
| Monthly Trial | $2.99 | per month |
| Yearly | $5.99 | per year |
| Yearly Trial | $9.99 | per year |
| Loyal Pass Monthly WB | $9.99 | per month |
| Loyal Pass Yearly WB | $59.99 | per year |
| LifeTime Access | $1.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 💧 Helps increase water intake
- 🔔 Reminders are helpful
- 🏆 Badges and awards are motivating
- 🔗 Links with Apple Health

**What reviewers complain about**

- 💸 Ads are unnecessary
- 💳 App requires payment for features
- 🚫 No easy way to close ads
- 🔢 No decimal option for logging
- 🔄 Units and settings not synced

**Reported bugs**

- App crashes frequently
- App freezes when logging drinks
- App closes immediately after logging fluid intake
- Cannot see logged information due to freezing
- Ads pop up on app boot

**Requested features**

- Add decimal option for logging drinks
- Allow customization of notification times
- Include soda and yogurt as drink options
- Improve drink and volume choices
- Provide a clear option to remove ads


## Frequently asked questions

### Is KOA Center free?

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

### Is Hydration Tracker free?

Hydration Tracker is free to download, with in-app purchases available.

### Do KOA Center or Hydration Tracker have ads?

Hydration Tracker shows ads; KOA Center does not.

### Which is updated more often, KOA Center or Hydration Tracker?

KOA Center ships an update monthly, and Hydration Tracker every 5 weeks. Most recently, KOA Center was updated on January 4, 2026 and Hydration Tracker on October 24, 2026.

---

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