# Contacts Backup & Sync vs PDF Reader Pro

The clearest difference is ads: Contacts Backup & Sync at none against PDF Reader Pro's shown. Contacts Backup & Sync also leads on update cadence (weekly vs every 2 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Contacts Backup & Sync sells 1 one-off in-app purchase and PDF Reader Pro sells 2 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Contacts Backup & Sync ships an update weekly, PDF Reader Pro every 2 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Contacts Backup & Sync | PDF Reader Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Weekly** | Every 2 weeks |
| Size | 25 MB | 13 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Inventio](https://appshunter.io/developer/1803297182) | [Amar Singh Ahirwar](https://appshunter.io/developer/1806157106) |

## What reviewers say

### Contacts Backup & Sync

[App page](https://appshunter.io/ios/app/contacts-backup-and-sync/id6753915065)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Contact Backup & Sync Pro | $1.99 | one-time |


### PDF Reader Pro

[App page](https://appshunter.io/ios/app/pdf-reader-pro-edit-and-sign/id6754225445)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Yearly Plan | $34.99 | per year |


## Frequently asked questions

### Is Contacts Backup & Sync free?

Contacts Backup & Sync is free to download, with in-app purchases available.

### Is PDF Reader Pro free?

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

### Do Contacts Backup & Sync or PDF Reader Pro have ads?

PDF Reader Pro shows ads; Contacts Backup & Sync does not.

### Which is updated more often, Contacts Backup & Sync or PDF Reader Pro?

Contacts Backup & Sync ships an update weekly, and PDF Reader Pro every 2 weeks. Most recently, Contacts Backup & Sync was updated on October 25, 2026 and PDF Reader Pro 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.*