# opchat vs Byrthday

The clearest difference is ads: opchat at none against Byrthday's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. opchat sells 2 one-off in-app purchases and Byrthday sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

opchat ships an update every 2 weeks, Byrthday every 10 days. The most recent releases landed on November 5, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | opchat | Byrthday |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/opchat-private-on-device-ai/id6761932211/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 170 MB | 72 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Przemyslaw Klosek](https://appshunter.io/developer/1536276533) | [Silvio Lindstedt](https://appshunter.io/developer/1894663856) |

## What reviewers say

### opchat

[App page](https://appshunter.io/ios/app/opchat-private-on-device-ai/id6761932211)

Chat with multiple AI models using your own API keys or run them on your device. Integrates with your calendar, reminders, and productivity apps. Offers custom personas and conversation organization.

**Highlights:** Multi-provider AI chat, On-device model execution, Bring Your Own Key (BYOK), Calendar and reminder integration, Customizable AI personas, Conversation organization and export, Image generation and editing

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Unlock Promo | $9.99 | one-time |
| Pro Unlock | $14.99 | one-time |


### Byrthday

[App page](https://appshunter.io/ios/app/byrthday/id6819082841)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus monthly | $0.99 | per month |
| Plus yearly | $8.99 | per year |
| Byrthday Plus (no AI) | $6.99 | one-time |
| Plus lifetime | $24.99 | one-time |


## Frequently asked questions

### Is opchat free?

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

### Is Byrthday free?

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

### Do opchat or Byrthday have ads?

Byrthday shows ads; opchat does not.

### Which is updated more often, opchat or Byrthday?

opchat ships an update every 2 weeks, and Byrthday every 10 days. Most recently, opchat was updated on November 5, 2026 and Byrthday on November 1, 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.*