# Sign PDF vs かんたん電子印鑑

The clearest difference is in-app purchases: かんたん電子印鑑 at none against Sign PDF's 10. Sign PDF's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Sign PDF sells 10 in-app purchases, starting at $2.99 per 7 days. かんたん電子印鑑 asks for nothing beyond the download.

Sign PDF ships an update every 9 days, かんたん電子印鑑 every 11 days. The most recent releases landed on October 25, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Sign PDF | かんたん電子印鑑 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sign-pdf-esign-and-fill-forms/id6763507968/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 11 days |
| Monetization | Free with in-app purchases | — |
| Size | 43 MB | 25 MB |
| Requires iOS | 18 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [DECLAN JOHN NANTON](https://appshunter.io/developer/1888733891) | [RAINBOW TREE LLC](https://appshunter.io/developer/1619997282) |

## What reviewers say

### Sign PDF

[App page](https://appshunter.io/ios/app/sign-pdf-esign-and-fill-forms/id6763507968)

Easily sign, fill, and scan documents directly from your iPhone. Add signatures, stamps, and text to PDFs without needing to print or use a computer. All your work stays private on your device.

**Highlights:** eSign PDFs by drawing, typing, or importing, Add custom stamps and seals with background removal, Built-in document scanner to PDF, Instantly fill out PDF forms, Save multiple signatures and stamps, Export flattened, device-consistent PDFs, Privacy-focused, on-device processing

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| eSign & Fill Contracts | $2.99 | per 7 days |
| Stamp, Seal & Scan Pass | $3.99 | per 7 days |
| Fill Forms Pro Monthly | $6.99 | per month |
| Paperwork Pass — 3 Months | $7.99 | per 3 months |
| PDF Editor & Scanner Plan | $9.99 | per month |
| Sign Documents Quarterly | $9.99 | per 3 months |
| Contract Kit — 3 Months | $12.99 | per 3 months |
| Annual — Unlimited Signatures | $19.99 | per year |
| Unlimited Signatures Annual | $29.99 | per year |
| eSignature & Stamps Yearly | $39.99 | per year |


### かんたん電子印鑑

[App page](https://appshunter.io/ios/app/pdf/id6791579180)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sign PDF free?

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

### Is かんたん電子印鑑 free?

かんたん電子印鑑 is free to download, with no in-app purchases.

### Do Sign PDF or かんたん電子印鑑 have ads?

かんたん電子印鑑 shows ads; Sign PDF does not.

### Which is updated more often, Sign PDF or かんたん電子印鑑?

Sign PDF ships an update every 9 days, and かんたん電子印鑑 every 11 days. Most recently, Sign PDF was updated on October 25, 2026 and かんたん電子印鑑 on October 20, 2026.

---

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