# Zeno vs Isy.AI

The clearest difference is in-app purchases: Isy.AI at none against Zeno's 3. Isy.AI also leads on update cadence (every 3 days vs every 6 weeks). Zeno's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Zeno sells 3 one-off in-app purchases. Isy.AI asks for nothing beyond the download.

Zeno ships an update every 6 weeks, Isy.AI every 3 days. The most recent releases landed on November 5, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Zeno | Isy.AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/isyai-ai-notes-second-brain/id6809262091/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Monetization | — | Free |
| Size | 51 MB | 60 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Michael Smyth](https://appshunter.io/developer/1869910082) | [Akhil Arunkumar](https://appshunter.io/developer/1877687216) |

## What reviewers say

### Zeno

[App page](https://appshunter.io/ios/app/zeno-ai/id6759390645)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50 Credits | $1.00 | one-time |
| 200 Credits | $2.99 | one-time |
| 500 Credits | $4.99 | one-time |


### Isy.AI

[App page](https://appshunter.io/ios/app/isyai-ai-notes-second-brain/id6809262091)

Capture thoughts, voice memos, images, and PDFs, and let AI automatically link them to related past ideas. Engage in conversations with your notes, receive daily digests of connected thoughts, and visualize your knowledge network.

**Highlights:** Automatic note linking and connection, Text, voice, image, and PDF capture, AI-powered chat with your notes, Daily digests of connected ideas, Visual knowledge map, Export notes as Markdown or PDF

**In-app purchases:** none


## Frequently asked questions

### Is Zeno free?

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

### Is Isy.AI free?

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

### Do Zeno or Isy.AI have ads?

Neither Zeno nor Isy.AI shows ads.

### Which is updated more often, Zeno or Isy.AI?

Zeno ships an update every 6 weeks, and Isy.AI every 3 days. Most recently, Zeno was updated on November 5, 2026 and Isy.AI on November 6, 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.*