# HappyGo CERA vs OpenGS

The clearest difference is price: HappyGo CERA at Free against OpenGS's $1.99. HappyGo CERA also leads on iOS requirement (13.0 vs 17.0). OpenGS's advantage is update cadence (daily vs every 4 months). On ads, in-app purchases and device support there is nothing between them.

HappyGo CERA is free to download; OpenGS costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

HappyGo CERA ships an update every 4 months, OpenGS daily. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | HappyGo CERA | OpenGS |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[2.6 (5 ratings)](https://appshunter.io/ios/app/happygo-cera/id6744058705/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Daily** |
| Monetization | Free | — |
| Size | 30 MB | 36 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Zhuhai Luckyman Technology Co.,ltd.](https://appshunter.io/developer/1656022430) | [鉴 郗](https://appshunter.io/developer/559961494) |

## What reviewers say

### HappyGo CERA

[App page](https://appshunter.io/ios/app/happygo-cera/id6744058705)

Control CERA+ smart mugs and portable coffee machines from your phone. Monitor battery and working status, set precise temperatures, and schedule brewing times. This app offers a user-friendly interface for managing your connected CERA+ devices.

**Highlights:** Control CERA+ devices, Monitor battery status, Monitor working status, Set custom temperatures, Schedule brewing times, Temperature presets

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

**In-app purchases:** none


### OpenGS

[App page](https://appshunter.io/ios/app/opengs/id6780107068)

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

**In-app purchases:** none


## Frequently asked questions

### Is HappyGo CERA free?

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

### Is OpenGS free?

OpenGS costs $1.99, with no in-app purchases.

### Do HappyGo CERA or OpenGS have ads?

Neither HappyGo CERA nor OpenGS shows ads.

### Which is updated more often, HappyGo CERA or OpenGS?

HappyGo CERA ships an update every 4 months, and OpenGS daily. Most recently, HappyGo CERA was updated on October 30, 2026 and OpenGS on October 28, 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.*