# AI Chat Assistant vs Plain

The clearest difference is review sentiment: AI Chat Assistant at 100% against Plain's 50%. AI Chat Assistant also leads on update cadence (every 5 days vs every 4 months). Plain's advantage is monetization model (free with in-app purchases vs subscription) and device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. AI Chat Assistant sells 3 in-app purchases, starting at $6.99 per 7 days and Plain sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

AI Chat Assistant ships an update every 5 days, Plain every 4 months. The most recent releases landed on October 20, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | AI Chat Assistant | Plain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (33 ratings)](https://appshunter.io/ios/app/ai-chat-assistant-openchat/id6450590497/reviews)** | — |
| Number of ratings | **33** | — |
| Positive reviews | **100.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 4 months |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 37 MB | 26 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Mingo AI](https://appshunter.io/developer/1776174876) | [MOBIVERSITE YAZILIM BILISIM REKLAM VE DANISMANLIK HIZMETLERI SANAYI TICARET LIMITED STI](https://appshunter.io/developer/968440561) |

## What reviewers say

### AI Chat Assistant

[App page](https://appshunter.io/ios/app/ai-chat-assistant-openchat/id6450590497)

This AI assistant leverages advanced models like GPT-4o and Gemini to provide instant answers, generate creative text, summarize documents, and even write code. It acts as a versatile tool for productivity, learning, and creative tasks.

**Highlights:** Instant AI answers, AI writing assistant, Creative content generation, PDF summarization and translation, YouTube video summarization, AI keyboard integration, Code generation and debugging

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly subscription | $6.99 | per 7 days |
| Monthly Subscription | $16.99 | per month |
| Annual Plan (Best Offer) | $49.99 | per year |


### Plain

[App page](https://appshunter.io/ios/app/plain-ai-keyboard/id6467874401)

This advanced AI-powered keyboard acts as your personal text assistant, offering features like grammar correction, translation, and tone adjustment. It helps you write, communicate, and generate text more effectively across all your applications.

**Highlights:** Grammar and spell check, Seamless translation, AI-powered answers, Tone adjustment, Text paraphrasing, Response generation, Text continuation, Synonym finder

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Week PRO | $4.99 | per 7 days |
| 1 Month PRO | $9.99 | per month |
| 1 Year PRO | $39.99 | per year |


## Frequently asked questions

### Is AI Chat Assistant free?

AI Chat Assistant is free to download, with in-app purchases available.

### Is Plain free?

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

### Do AI Chat Assistant or Plain have ads?

Neither AI Chat Assistant nor Plain shows ads.

### Which is updated more often, AI Chat Assistant or Plain?

AI Chat Assistant ships an update every 5 days, and Plain every 4 months. Most recently, AI Chat Assistant was updated on October 20, 2026 and Plain on October 30, 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.*