# PDF Signer vs FormDrop

The clearest difference is update cadence: PDF Signer at every 10 days against FormDrop's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PDF Signer sells 1 one-off in-app purchase and FormDrop sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

PDF Signer ships an update every 10 days, FormDrop every 2 months. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | PDF Signer | FormDrop |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 months |
| Size | 56 MB | 1 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [秋杰 田](https://appshunter.io/developer/1062156979) | [Shanghai Pandou Technology Co., Ltd](https://appshunter.io/developer/6782072298) |

## What reviewers say

### PDF Signer

[App page](https://appshunter.io/ios/app/pdf-signer-sign-stamp-edit/id6762083786)

**Features:** macOS Compatibility, Family Sharing, Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Membership | $3.99 | one-time |


### FormDrop

[App page](https://appshunter.io/ios/app/formdrop/id6782072296)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FormDrop Pro Lifetime | $2.99 | one-time |


## Frequently asked questions

### Is PDF Signer free?

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

### Is FormDrop free?

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

### Do PDF Signer or FormDrop have ads?

Neither PDF Signer nor FormDrop shows ads.

### Which is updated more often, PDF Signer or FormDrop?

PDF Signer ships an update every 10 days, and FormDrop every 2 months. Most recently, PDF Signer was updated on November 9, 2026 and FormDrop on November 5, 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.*