# WaterGuru vs 3D Displayer

The clearest difference is review sentiment: WaterGuru at 74% against 3D Displayer's 22%. WaterGuru also leads on rating (4.1 vs 1.8) and ratings volume (239 vs 13). 3D Displayer's advantage is iOS requirement (9.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

WaterGuru holds the better App Store score, 4.1 against 1.8. That said, the two scores are not equally well evidenced: WaterGuru has 239 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 74% of WaterGuru's written reviews are positive against 22% of 3D Displayer's.

WaterGuru ships an update every 4 weeks, 3D Displayer every 3 weeks. Both last shipped on November 2, 2026.

## The numbers

| Metric | WaterGuru | 3D Displayer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (239 ratings)](https://appshunter.io/ios/app/waterguru/id1372295527/reviews)** | [1.8 (13 ratings)](https://appshunter.io/ios/app/3d-displayer/id1381341174/reviews) |
| Number of ratings | **239** | 13 |
| Positive reviews | **73.8% of reviews** | 22.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 155 MB | 4 MB |
| Requires iOS | 15.0 | **9.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WaterGuru, Inc](https://appshunter.io/developer/1153080819) | [Shenzhen Feitianxia Technology Co, Ltd.](https://appshunter.io/developer/536103551) |

## 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


### 3D Displayer

[App page](https://appshunter.io/ios/app/3d-displayer/id1381341174)

This application allows users to transfer photos and videos to an LED 3D hologram advertiser via Wi-Fi. It also enables file management, including viewing, renaming, listing, and deleting content stored on the advertiser.

**Highlights:** Transfer photos/videos via Wi-Fi, View stored files on advertiser, Control displayed content, Manage files (rename, list, delete)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WaterGuru free?

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

### Is 3D Displayer free?

3D Displayer is free to download, with no in-app purchases.

### Which has better reviews, WaterGuru or 3D Displayer?

WaterGuru is rated higher. WaterGuru averages 4.1 out of 5 from 239 ratings, while 3D Displayer averages 1.8 from 13 ratings.

### Do WaterGuru or 3D Displayer have ads?

Neither WaterGuru nor 3D Displayer shows ads.

### Which is updated more often, WaterGuru or 3D Displayer?

WaterGuru ships an update every 4 weeks, and 3D Displayer every 3 weeks. Most recently, WaterGuru was updated on November 2, 2026 and 3D Displayer on November 2, 2026.

---

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