# ERIS vs CHOWACO ThingsWater

The clearest difference is iOS requirement: ERIS at 13.4 against CHOWACO ThingsWater's 16.0. 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.

ERIS ships an update every 5 weeks, CHOWACO ThingsWater monthly. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ERIS | CHOWACO ThingsWater |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Free | — |
| Size | 39 MB | 122 MB |
| Requires iOS | **13.4** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Bach Khoa Investment & Development of Solar Energy Corporation](https://appshunter.io/developer/1131639223) | [INTELLI TECHNOLOGY JOINT STOCK COMPANY](https://appshunter.io/developer/1481950363) |

## What reviewers say

### ERIS

[App page](https://appshunter.io/ios/app/eris/id1605516994)

Monitor and manage local green energy sources and projects. Control inverter power, track energy generation, and view savings from CO2 emissions and electricity prices. Receive real-time alerts for system anomalies.

**Highlights:** Manage and monitor all projects, Control inverter power, Track energy generation and savings, View CO2 emissions reduction, Real-time system anomaly alerts

**Features:** macOS Compatibility

**In-app purchases:** none


### CHOWACO ThingsWater

[App page](https://appshunter.io/ios/app/chowaco-thingswater/id6621238725)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ERIS free?

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

### Is CHOWACO ThingsWater free?

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

### Do ERIS or CHOWACO ThingsWater have ads?

Neither ERIS nor CHOWACO ThingsWater shows ads.

### Which is updated more often, ERIS or CHOWACO ThingsWater?

ERIS ships an update every 5 weeks, and CHOWACO ThingsWater monthly. Most recently, ERIS was updated on October 12, 2026 and CHOWACO ThingsWater 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.*