# H2OCHK vs Robotic Imaging

The clearest difference is review sentiment: Robotic Imaging at 100% against H2OCHK's 0%. Robotic Imaging also leads on rating (4.7 vs 1.0) and ads (none vs shown). H2OCHK's advantage is iOS requirement (12.2 vs 16.4). On price, in-app purchases and device support there is nothing between them.

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

Robotic Imaging holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Robotic Imaging has 13 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of H2OCHK's written reviews are positive against 100% of Robotic Imaging's.

H2OCHK ships an update monthly, Robotic Imaging every 2 weeks. The most recent releases landed on October 7, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | H2OCHK | Robotic Imaging |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/h2ochk/id1159162921/reviews) | **[4.7 (13 ratings)](https://appshunter.io/ios/app/robotic-imaging/id6755092431/reviews)** |
| Number of ratings | 2 | **13** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 40 MB | 79 MB |
| Requires iOS | **12.2** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Digital Concepts of Missouri, Inc.](https://appshunter.io/developer/1159162920) | [Robotic Imaging, Inc.](https://appshunter.io/developer/1546776638) |

## What reviewers say

### H2OCHK

[App page](https://appshunter.io/ios/app/h2ochk/id1159162921)

This application transforms your smart device into a water chemistry analyzer. It simplifies water maintenance by calculating precise chemical dosages for pools and hot tubs based on your setup and current chemicals.

**Highlights:** Smart device integration, Automated chemical dosage calculation, Pool and hot tub water analysis, Chemical product recommendations, Dosing sequence guidance

**In-app purchases:** none


### Robotic Imaging

[App page](https://appshunter.io/ios/app/robotic-imaging/id6755092431)

Streamline field operations with a comprehensive tool for project management and documentation. Capture data, organize files, and collaborate with teams seamlessly on the go. Enhance productivity and accuracy with intuitive on-site tools and easy sharing.

**Highlights:** On-site data and image capture, PDF and photo gallery organization, Project creation and editing, Detailed capture forms, Integrated map navigation, Streamlined sharing and collaboration, Cross-device accessibility

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

**In-app purchases:** none


## Frequently asked questions

### Is H2OCHK free?

H2OCHK is free to download, with no in-app purchases.

### Is Robotic Imaging free?

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

### Which has better reviews, H2OCHK or Robotic Imaging?

Robotic Imaging is rated higher. H2OCHK averages 1.0 out of 5 from 2 ratings, while Robotic Imaging averages 4.7 from 13 ratings.

### Do H2OCHK or Robotic Imaging have ads?

H2OCHK shows ads; Robotic Imaging does not.

### Which is updated more often, H2OCHK or Robotic Imaging?

H2OCHK ships an update monthly, and Robotic Imaging every 2 weeks. Most recently, H2OCHK was updated on October 7, 2026 and Robotic Imaging on October 28, 2026.

---

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