# PDF Tools vs UnderLimit

The clearest difference is in-app purchases: PDF Tools at none against UnderLimit's 1. UnderLimit's advantage is ads (none vs shown) and update cadence (every 2 days vs fortnightly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. UnderLimit sells 1 one-off in-app purchase. PDF Tools asks for nothing beyond the download.

PDF Tools ships an update fortnightly, UnderLimit every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | PDF Tools | UnderLimit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/pdf-tools-create-and-edit-pdfs/id6757467950/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Ad-supported | — |
| Size | 10 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [PixelWave LLC](https://appshunter.io/developer/1813104661) | [ALESSANDRO VINCENZO DEL BALZO](https://appshunter.io/developer/6813135046) |

## What reviewers say

### PDF Tools

[App page](https://appshunter.io/ios/app/pdf-tools-create-and-edit-pdfs/id6757467950)

Easily create, merge, split, and reorder PDF pages from photos or existing documents. This app offers a user-friendly interface for managing PDFs on the go, perfect for students and professionals.

**Highlights:** Convert photos to PDF, Merge multiple PDF files, Split PDFs into separate files, Reorder and delete PDF pages, User-friendly interface, High-quality output

**Features:** macOS Compatibility

**In-app purchases:** none


### UnderLimit

[App page](https://appshunter.io/ios/app/underlimit-pdf-compressor/id6813135044)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UnderLimit Unlimited | $2.99 | one-time |


## Frequently asked questions

### Is PDF Tools free?

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

### Is UnderLimit free?

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

### Do PDF Tools or UnderLimit have ads?

PDF Tools shows ads; UnderLimit does not.

### Which is updated more often, PDF Tools or UnderLimit?

PDF Tools ships an update fortnightly, and UnderLimit every 2 days. Most recently, PDF Tools was updated on October 31, 2026 and UnderLimit on October 31, 2026.

---

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