# PDF Compressor vs ATLAS

The clearest difference is in-app purchases: ATLAS at none against PDF Compressor's 3. ATLAS also leads on ads (none vs shown) and update cadence (every 10 days vs every 11 months). PDF Compressor's advantage is iOS requirement (15.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. PDF Compressor sells 3 in-app purchases, starting at $0.99 per 7 days. ATLAS asks for nothing beyond the download.

PDF Compressor ships an update every 11 months, ATLAS every 10 days. The most recent releases landed on October 28, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | PDF Compressor | ATLAS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/atlas-ai-agent/id6788955613/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 11 months | **Every 10 days** |
| Monetization | — | Free |
| Size | 15 MB | 15 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kevin Rupareliya](https://appshunter.io/developer/1768692577) | [Ayonix Inc.](https://appshunter.io/developer/714840475) |

## What reviewers say

### PDF Compressor

[App page](https://appshunter.io/ios/app/pdf-compressor-compress-pdf/id6754836336)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly   1 Week | $0.99 | per 7 days |
| Monthly   1 Month | $2.99 | per month |
| Yearly   1 Year | $19.99 | per year |


### ATLAS

[App page](https://appshunter.io/ios/app/atlas-ai-agent/id6788955613)

This enterprise AI assistant offers conversational chat and real-time voice interactions with your business data and tools. It includes pre-built agents for various departments and supports workflow orchestration with approvals.

**Highlights:** Conversational AI chat with business data, Real-time voice conversations, Pre-built AI agents for sales, support, marketing, finance, operations, Workflow orchestration with approvals, Secure single sign-on

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Compressor free?

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

### Is ATLAS free?

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

### Do PDF Compressor or ATLAS have ads?

PDF Compressor shows ads; ATLAS does not.

### Which is updated more often, PDF Compressor or ATLAS?

PDF Compressor ships an update every 11 months, and ATLAS every 10 days. Most recently, PDF Compressor was updated on October 28, 2026 and ATLAS on October 11, 2026.

---

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