# MS Pay vs iSign

The clearest difference is in-app purchases: MS Pay at none against iSign's 4. MS Pay also leads on iOS requirement (9.0 vs 18.0). iSign's advantage is update cadence (fortnightly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. iSign sells 4 in-app purchases, starting at $0.99 per month. MS Pay asks for nothing beyond the download.

MS Pay ships an update every 2 months, iSign fortnightly. The most recent releases landed on October 17, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | MS Pay | iSign |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/isign-pdf-reader-ai-editor/id6444390217/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 21 MB | 69 MB |
| Requires iOS | **9.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MERCHANT SUPPORT CO., LTD.](https://appshunter.io/developer/1222333502) | [Bruno Wide](https://appshunter.io/developer/1262013609) |

## What reviewers say

### MS Pay

[App page](https://appshunter.io/ios/app/ms-pay/id1222333503)

**Features:** macOS Compatibility

**In-app purchases:** none


### iSign

[App page](https://appshunter.io/ios/app/isign-pdf-reader-ai-editor/id6444390217)

Transform any document into a searchable, signable PDF. Scan, organize, and edit with AI-powered summaries and OCR. Your data remains private on your device.

**Highlights:** Scan documents to PDF, Automatic edge detection, Edit and sign documents, OCR text recognition, AI-powered summaries, On-device data storage

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scanner Pro - Monthly Promo | $0.99 | per month |
| Scanner Pro - Monthly | $1.99 | per month |
| Scanner Pro - Yearly Promo | $9.99 | per year |
| Scanner Pro - Yearly | $19.99 | per year |


## Frequently asked questions

### Is MS Pay free?

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

### Is iSign free?

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

### Do MS Pay or iSign have ads?

Neither MS Pay nor iSign shows ads.

### Which is updated more often, MS Pay or iSign?

MS Pay ships an update every 2 months, and iSign fortnightly. Most recently, MS Pay was updated on October 17, 2026 and iSign on October 14, 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.*