# Superpdf vs Signature Notes

The clearest difference is update cadence: Superpdf at every 3 days against Signature Notes's every 5 weeks. Signature Notes's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Superpdf ships an update every 3 days, Signature Notes every 5 weeks. The most recent releases landed on October 12, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Superpdf | Signature Notes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/signature-notes/id6762539686/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 3 days** | Every 5 weeks |
| Monetization | — | Ad-supported |
| Size | 18 MB | 40 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Shaanxi Saiwangdao Network Technology Co., Ltd](https://appshunter.io/developer/1855798461) | [William Wilborn](https://appshunter.io/developer/1893476384) |

## What reviewers say

### Superpdf

[App page](https://appshunter.io/ios/app/superpdfsmartpdf/id6758294031)

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

**In-app purchases:** none


### Signature Notes

[App page](https://appshunter.io/ios/app/signature-notes/id6762539686)

Capture ideas in various formats, from rich text and drawings to audio, video, and annotated images. Organize and share notes easily, and sharpen your mind with an integrated sliding puzzle game offering customizable challenges and modes.

**Highlights:** Multiple note types (rich text, drawing, multimedia, checklists, annotated images), Full-text search and filtering, Integrated sliding puzzle game, Customizable puzzle difficulty and modes, Custom themes and background music, Productivity and puzzle statistics tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is Superpdf free?

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

### Is Signature Notes free?

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

### Do Superpdf or Signature Notes have ads?

Both Superpdf and Signature Notes show ads.

### Which is updated more often, Superpdf or Signature Notes?

Superpdf ships an update every 3 days, and Signature Notes every 5 weeks. Most recently, Superpdf was updated on October 12, 2026 and Signature Notes on October 24, 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.*