# Romi（ロミィ） vs HAPPY RAT

The clearest difference is in-app purchases: Romi（ロミィ） at none against HAPPY RAT's 1. HAPPY RAT's advantage is review sentiment (50% vs 33%) and iOS requirement (15.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. HAPPY RAT sells 1 one-off in-app purchase. Romi（ロミィ） asks for nothing beyond the download.

Romi（ロミィ） ships an update monthly, HAPPY RAT every 3 weeks. The most recent releases landed on August 24, 2026 and August 25, 2026 respectively.

## The numbers

| Metric | Romi（ロミィ） | HAPPY RAT |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 32 MB | 235 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [MIXI, Inc.](https://appshunter.io/developer/285951869) | [SpiralAI Inc.](https://appshunter.io/developer/1801163634) |

## What reviewers say

### Romi（ロミィ）

[App page](https://appshunter.io/ios/app/romi/id1478600631)

This companion app facilitates the setup and customization of a conversational AI robot. It offers guidance on engaging with the robot and accessing its various helpful functions, such as weather updates, alarms, and language learning.

**Highlights:** Initial setup and configuration, Connection to wireless internet, View robot status (e.g., battery), Conversation tips and guides, Access to helpful functions, English conversation practice

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

**In-app purchases:** none


### HAPPY RAT

[App page](https://appshunter.io/ios/app/happy-rat/id6743077018)

Engage in emotionally intelligent conversations with AI companions designed to provide comfort and companionship. These lively characters learn about you, offering personalized interactions and support to alleviate loneliness.

**Highlights:** Emotional AI conversations, Personalized character interactions, Comfort and companionship, Unique AI engine for natural talk, Bonding and trust building, Character learning and memory

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HAPPY PLUS | $79.99 | one-time |


## Frequently asked questions

### Is Romi（ロミィ） free?

Romi（ロミィ） is free to download, with no in-app purchases.

### Is HAPPY RAT free?

HAPPY RAT is free to download, with in-app purchases available.

### Do Romi（ロミィ） or HAPPY RAT have ads?

Neither Romi（ロミィ） nor HAPPY RAT shows ads.

### Which is updated more often, Romi（ロミィ） or HAPPY RAT?

Romi（ロミィ） ships an update monthly, and HAPPY RAT every 3 weeks. Most recently, Romi（ロミィ） was updated on August 24, 2026 and HAPPY RAT on August 25, 2026.

---

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