# HOOH AI PDF Document Assistant vs Sphere

The clearest difference is ads: Sphere at none against HOOH AI PDF Document Assistant's shown. Sphere also leads on iOS requirement (16.4 vs 18.6). HOOH AI PDF Document Assistant's advantage is update cadence (every 5 days vs every 3 weeks). On price, in-app purchases and device support 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 and Sphere sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

HOOH AI PDF Document Assistant ships an update every 5 days, Sphere every 3 weeks. The most recent releases landed on October 14, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | HOOH AI PDF Document Assistant | Sphere |
| --- | --- | --- |
| 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 | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 42 MB | 57 MB |
| Requires iOS | 18.6 | **16.4** |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Hooh Inc](https://appshunter.io/developer/1836728025) | [Rajesh Cherukuri](https://appshunter.io/developer/6781198482) |

## What reviewers say

### 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 |


### Sphere

[App page](https://appshunter.io/ios/app/sphere-multi-model-ai-chat/id6781198480)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sphere Pro: Compare AI Models | $7.99 | per month |
| Sphere Pro: Multi AI Copilot | $54.99 | per year |


## Frequently asked questions

### Is HOOH AI PDF Document Assistant free?

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

### Is Sphere free?

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

### Do HOOH AI PDF Document Assistant or Sphere have ads?

HOOH AI PDF Document Assistant shows ads; Sphere does not.

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

HOOH AI PDF Document Assistant ships an update every 5 days, and Sphere every 3 weeks. Most recently, HOOH AI PDF Document Assistant was updated on October 14, 2026 and Sphere on October 25, 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.*