# Marginal AI vs Copydog

The clearest difference is in-app purchases: Copydog at none against Marginal AI's 10. Copydog also leads on update cadence (monthly vs every 2 months). Marginal AI's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Marginal AI sells 10 in-app purchases, starting at $34.99 per 7 days. Copydog asks for nothing beyond the download.

Marginal AI ships an update every 2 months, Copydog monthly. The most recent releases landed on October 26, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Marginal AI | Copydog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 40 MB | 24 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [quanti-tech](https://appshunter.io/developer/1872078194) | [Future Exploration Technologies Limited](https://appshunter.io/developer/1475606994) |

## What reviewers say

### Marginal AI

[App page](https://appshunter.io/ios/app/marginal-ai/id6758302475)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Summary Email 2x Weekly | $34.99 | per 7 days |
| Deep Research Email 2x Weekly | $174.99 | per 7 days |
| Deep Research SMS 2x Weekly | $179.99 | per 7 days |
| Deep Research Email 2x Daily | $219.99 | per 7 days |
| Deep Research SMS 2x Daily | $229.99 | per 7 days |
| Deep Research SMS Monthly | $239.99 | per month |
| Deep Research Email Hourly | $259.99 | per 7 days |
| 500 CU Pack | $57.99 | one-time |
| 1500 CU Pack | $171.99 | one-time |
| 5000 CU Pack | $579.00 | one-time |


### Copydog

[App page](https://appshunter.io/ios/app/copydog-copytrade-hyperliquid/id6787163673)

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

**In-app purchases:** none


## Frequently asked questions

### Is Marginal AI free?

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

### Is Copydog free?

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

### Do Marginal AI or Copydog have ads?

Neither Marginal AI nor Copydog shows ads.

### Which is updated more often, Marginal AI or Copydog?

Marginal AI ships an update every 2 months, and Copydog monthly. Most recently, Marginal AI was updated on October 26, 2026 and Copydog on October 21, 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.*