# ATN Obsidian vs Hcalory

The clearest difference is review sentiment: Hcalory at 67% against ATN Obsidian's 13%. Hcalory also leads on rating (4.3 vs 2.8) and update cadence (every 4 weeks vs every 4 months). ATN Obsidian's advantage is ratings volume (73 vs 11) and iOS requirement (10.3 vs 13.6). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Hcalory holds the better App Store score, 4.3 against 2.8. That said, the two scores are not equally well evidenced: ATN Obsidian has 73 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 13% of ATN Obsidian's written reviews are positive against 67% of Hcalory's.

ATN Obsidian ships an update every 4 months, Hcalory every 4 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | ATN Obsidian | Hcalory |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.8 (73 ratings)](https://appshunter.io/ios/app/atn-obsidian/id931990224/reviews) | **[4.3 (11 ratings)](https://appshunter.io/ios/app/hcalory/id6484163464/reviews)** |
| Number of ratings | **73** | 11 |
| Positive reviews | 12.9% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 weeks** |
| Monetization | Free | Free |
| Size | 37 MB | 24 MB |
| Requires iOS | **10.3** | 13.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [ATN](https://appshunter.io/developer/789970891) | [HONG KONG TING HUI LIMITED](https://appshunter.io/developer/1740490084) |

## What reviewers say

### ATN Obsidian

[App page](https://appshunter.io/ios/app/atn-obsidian/id931990224)

Connect to your ATN optical device via Wi-Fi to stream live video, capture photos and videos, and customize device settings. Enjoy a seamless experience with your ATN hardware.

**Highlights:** Connect to ATN optical devices, Live video streaming, Shoot photos, Record videos, Configure device settings

**Features:** macOS Compatibility

**In-app purchases:** none


### Hcalory

[App page](https://appshunter.io/ios/app/hcalory/id6484163464)

Control your air heater remotely with this app. Monitor parameters, adjust temperature and gears, set schedules, and activate modes like plateau and ventilation. Designed for specific supported heater models.

**Highlights:** Remote heater control, Parameter monitoring, Temperature and gear adjustment, Plateau mode activation, Ventilation control, Scheduling functionality

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

**In-app purchases:** none


## Frequently asked questions

### Is ATN Obsidian free?

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

### Is Hcalory free?

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

### Which has better reviews, ATN Obsidian or Hcalory?

Hcalory is rated higher. ATN Obsidian averages 2.8 out of 5 from 73 ratings, while Hcalory averages 4.3 from 11 ratings.

### Do ATN Obsidian or Hcalory have ads?

Neither ATN Obsidian nor Hcalory shows ads.

### Which is updated more often, ATN Obsidian or Hcalory?

ATN Obsidian ships an update every 4 months, and Hcalory every 4 weeks. Most recently, ATN Obsidian was updated on October 24, 2026 and Hcalory on October 24, 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.*