# Oi vs Cervus

The clearest difference is in-app purchases: Cervus at none against Oi's 4. Cervus also leads on device support (3 vs 1) and iOS requirement (14.0 vs 16.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Oi sells 4 in-app purchases, starting at $7.99 per 7 days. Cervus asks for nothing beyond the download.

Oi ships an update monthly, Cervus every 2 months. Both last shipped on October 6, 2026.

## The numbers

| Metric | Oi | Cervus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (20 ratings)](https://appshunter.io/ios/app/oi-ai-assistant/id6462895560/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Freemium | — |
| Size | 106 MB | 44 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [CYBER ONE LTD](https://appshunter.io/developer/1530625447) | [Rubik Smart Solutions](https://appshunter.io/developer/1483981076) |

## What reviewers say

### Oi

[App page](https://appshunter.io/ios/app/oi-ai-assistant/id6462895560)

This AI-powered application offers instant answers to your questions, generates stunning images from text descriptions, and summarizes documents. It also provides professional presentation creation, high-quality translation, and advanced image analysis to enhance your daily tasks.

**Highlights:** Instant photo/text question answering, AI-powered image creation, PDF/web link summarization, Professional presentation generation, High-quality translation, Advanced image analysis

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Oi Weekly Subscription | $7.99 | per 7 days |
| Oi Monthly Subscription | $12.99 | per month |
| Oi 3 Months Subscription | $29.99 | per 3 months |
| Oi Yearly Subscription | $99.99 | per year |


### Cervus

[App page](https://appshunter.io/ios/app/cervus/id6751539944)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Oi free?

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

### Is Cervus free?

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

### Do Oi or Cervus have ads?

Neither Oi nor Cervus shows ads.

### Which is updated more often, Oi or Cervus?

Oi ships an update monthly, and Cervus every 2 months. Most recently, Oi was updated on October 6, 2026 and Cervus on October 6, 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.*