# Emerald vs QRystal

Emerald and QRystal 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.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Emerald | QRystal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/emerald/id1561759351/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 17.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | Free | — |
| Size | 110 MB | 47 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EMERALD PLANET ENVIRONMENTAL PTY LTD](https://appshunter.io/developer/1526454239) | [CANGURU TECH PTY LTD](https://appshunter.io/developer/1480070738) |

## What reviewers say

### Emerald

[App page](https://appshunter.io/ios/app/emerald/id1561759351)

Monitor and control your home's energy usage, climate, and safety devices. Track electricity consumption in real-time, set budgets, and receive alerts for emergencies. Turn your air-con into a smart device for remote climate control.

**Highlights:** Real-time electricity usage tracking, Electricity budgeting, Smart air-con control, Remote climate adjustment, Smoke alarm monitoring, Emergency notifications

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

**In-app purchases:** none

**What reviewers like**

- 👍 Real-time electricity consumption monitoring
- 💰 Helps identify cost-saving opportunities
- 📊 Basic functionality works for tracking usage
- 🆓 Free or subsidized installation
- ➕ Add household members feature available

**What reviewers complain about**

- 🐛 Frequent app crashes and freezes
- 📡 Bluetooth connectivity issues and limited range
- 🔌 High battery drain on mobile devices
- ⏱️ Slow data syncing and connection times
- 🔐 Persistent login and authentication problems

**Reported bugs**

- App crashes on startup or when opening specific features
- Smart Actions stop working after updates
- Bluetooth connection drops frequently
- Data not syncing or updating after certain dates
- Login failures and forced logouts

**Requested features**

- Support for 3-tier and multi-tier tariff structures
- WiFi connectivity instead of Bluetooth only
- Advanced smart actions with conditional triggers
- Ability to set mode (boost/silent) in smart actions
- Scheduled automation based on water temperature/capacity


### QRystal

[App page](https://appshunter.io/ios/app/qrystal/id6449924286)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Emerald free?

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

### Is QRystal free?

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

### Do Emerald or QRystal have ads?

Neither Emerald nor QRystal shows ads.

### Which is updated more often, Emerald or QRystal?

Emerald ships an update monthly, and QRystal monthly. Most recently, Emerald was updated on October 16, 2026 and QRystal on October 5, 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.*