# WaterGuru vs Caseys Big Things

WaterGuru and Caseys Big Things are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

WaterGuru ships an update every 4 weeks, Caseys Big Things every 3 weeks. Both last shipped on October 25, 2026.

## The numbers

| Metric | WaterGuru | Caseys Big Things |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (239 ratings)](https://appshunter.io/ios/app/waterguru/id1372295527/reviews)** | — |
| Number of ratings | **239** | — |
| Positive reviews | 73.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 155 MB | 55 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WaterGuru, Inc](https://appshunter.io/developer/1153080819) | [Christopher Russell](https://appshunter.io/developer/1751116886) |

## What reviewers say

### WaterGuru

[App page](https://appshunter.io/ios/app/waterguru/id1372295527)

This app provides comprehensive control over your pool's water chemistry. It helps maintain a safe environment by keeping out harmful contaminants and offers lab-grade analysis and treatment advice for simplified pool management.

**Highlights:** Pool water chemistry control, Harmful virus and bacteria prevention, Lab-grade analysis, Water treatment advice, Simplified pool management

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💰 Money saver
- 🔍 Accurate readings
- 🕰️ Convenient daily monitoring
- 👨‍💻 Excellent customer service
- 🔧 Easy to use

**What reviewers complain about**

- 🐛 Connectivity issues
- 🔋 Battery drain
- 🤖 Inaccurate readings for some parameters
- 💸 Expensive cartridges
- 🤷‍♂️ Unreliable device

**Reported bugs**

- App notifications not working properly
- Inability to upload pool photos
- Inconsistent app performance after updates

**Requested features**

- Ability to set custom testing schedule
- Measure salt levels
- Provide more advice on adjusting water chemistry
- Add hourly temperature readings


### Caseys Big Things

[App page](https://appshunter.io/ios/app/caseys-big-things/id6746947154)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WaterGuru free?

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

### Is Caseys Big Things free?

Caseys Big Things is free to download, with no in-app purchases.

### Do WaterGuru or Caseys Big Things have ads?

Neither WaterGuru nor Caseys Big Things shows ads.

### Which is updated more often, WaterGuru or Caseys Big Things?

WaterGuru ships an update every 4 weeks, and Caseys Big Things every 3 weeks. Most recently, WaterGuru was updated on October 25, 2026 and Caseys Big Things on October 25, 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.*