# Open Agent vs Mammoth AI

The clearest difference is update cadence: Open Agent at every 9 days against Mammoth AI's every 3 weeks. Mammoth AI's advantage is iOS requirement (15.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Open Agent sells 2 in-app purchases, starting at $4.99 per 7 days and Mammoth AI sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Open Agent ships an update every 9 days, Mammoth AI every 3 weeks. The most recent releases landed on October 1, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Open Agent | Mammoth AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (16 ratings)](https://appshunter.io/ios/app/mammoth-ai-chatbot-assistant/id6777931840/reviews)** |
| Number of ratings | — | **16** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 101 MB | 96 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Hoang Nguyen Vu](https://appshunter.io/developer/1883922584) | [Marut Kumar](https://appshunter.io/developer/1890094471) |

## What reviewers say

### Open Agent

[App page](https://appshunter.io/ios/app/open-agent/id6760329760)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OpenAgent Pro Weekly | $4.99 | per 7 days |
| OpenAgent Pro Yearly | $99.99 | per year |


### Mammoth AI

[App page](https://appshunter.io/ios/app/mammoth-ai-chatbot-assistant/id6777931840)

This AI assistant builds a persistent memory vault from your shared information, learning and improving its skills over time. It integrates with your messaging platforms to take action and offers customizable autonomy levels for task management. Your data remains on your own infrastructure.

**Highlights:** Persistent memory vault, Self-improving skills, Messaging platform integration, Customizable autonomy levels, Runs on your own infrastructure, Open source

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hermes AI Subscription | $4.99 | per 7 days |
| Hermes AI Weekly Subscription | $9.99 | per 7 days |
| Hermes AI Yearly Subscription | $39.99 | per year |


## Frequently asked questions

### Is Open Agent free?

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

### Is Mammoth AI free?

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

### Do Open Agent or Mammoth AI have ads?

Neither Open Agent nor Mammoth AI shows ads.

### Which is updated more often, Open Agent or Mammoth AI?

Open Agent ships an update every 9 days, and Mammoth AI every 3 weeks. Most recently, Open Agent was updated on October 1, 2026 and Mammoth AI on October 19, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*