# AI Reply Assistant vs Zig.ai

The clearest difference is in-app purchases: Zig.ai at none against AI Reply Assistant's 1. Zig.ai also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. AI Reply Assistant sells 1 in-app purchase, starting at $6.99 per month. Zig.ai asks for nothing beyond the download.

AI Reply Assistant ships an update monthly, Zig.ai fortnightly. The most recent releases landed on October 7, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | AI Reply Assistant | Zig.ai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Size | 4 MB | 56 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DIGITAL SYNC, LLC, THE](https://appshunter.io/developer/1252265729) | [Zig AI](https://appshunter.io/developer/1896759399) |

## What reviewers say

### AI Reply Assistant

[App page](https://appshunter.io/ios/app/ai-reply-assistant-business/id6769724031)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $6.99 | per month |


### Zig.ai

[App page](https://appshunter.io/ios/app/zigai/id6770636697)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AI Reply Assistant free?

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

### Is Zig.ai free?

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

### Do AI Reply Assistant or Zig.ai have ads?

Neither AI Reply Assistant nor Zig.ai shows ads.

### Which is updated more often, AI Reply Assistant or Zig.ai?

AI Reply Assistant ships an update monthly, and Zig.ai fortnightly. Most recently, AI Reply Assistant was updated on October 7, 2026 and Zig.ai on October 13, 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.*