# Synapse Notes vs HOOH AI PDF Document Assistant

The clearest difference is in-app purchases: Synapse Notes at none against HOOH AI PDF Document Assistant's 4. Synapse Notes also leads on ads (none vs shown) and update cadence (every 2 days vs every 5 days). On price, device support and iOS requirement there is nothing between them.

Both are free to download. HOOH AI PDF Document Assistant sells 4 in-app purchases, starting at $9.99 per month. Synapse Notes asks for nothing beyond the download.

Synapse Notes ships an update every 2 days, HOOH AI PDF Document Assistant every 5 days. The most recent releases landed on September 27, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Synapse Notes | HOOH AI PDF Document Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hooh-ai-pdf-document-assistant/id6763233940/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Every 5 days |
| Monetization | — | Free with in-app purchases |
| Size | 8 MB | 42 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Can Ahmet Ozguven](https://appshunter.io/developer/1860802261) | [Hooh Inc](https://appshunter.io/developer/1836728025) |

## What reviewers say

### Synapse Notes

[App page](https://appshunter.io/ios/app/synapse-notes/id6759223987)

**Features:** macOS Compatibility

**In-app purchases:** none


### HOOH AI PDF Document Assistant

[App page](https://appshunter.io/ios/app/hooh-ai-pdf-document-assistant/id6763233940)

This AI-powered workspace helps you manage and understand your documents. It allows you to chat with PDFs, summarize content, edit forms, and search across your private files. Keep your important papers organized and accessible.

**Highlights:** Chat with PDFs and documents, Summarize long documents, Edit and fill forms, Search across documents, Organize personal papers, Work in preferred language

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hooh Pro Monthly | $9.99 | per month |
| Premium Monthly | $19.00 | per month |
| Hooh Pro Yearly | $99.00 | per year |
| Premium Yearly | $199.00 | per year |


## Frequently asked questions

### Is Synapse Notes free?

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

### Is HOOH AI PDF Document Assistant free?

HOOH AI PDF Document Assistant is free to download, with in-app purchases available.

### Do Synapse Notes or HOOH AI PDF Document Assistant have ads?

HOOH AI PDF Document Assistant shows ads; Synapse Notes does not.

### Which is updated more often, Synapse Notes or HOOH AI PDF Document Assistant?

Synapse Notes ships an update every 2 days, and HOOH AI PDF Document Assistant every 5 days. Most recently, Synapse Notes was updated on September 27, 2026 and HOOH AI PDF Document Assistant on October 14, 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.*