# Contacts Backup & Sync vs Authenticator

The clearest difference is iOS requirement: Contacts Backup & Sync at 15.1 against Authenticator's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Contacts Backup & Sync sells 1 one-off in-app purchase and Authenticator sells 4 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Contacts Backup & Sync | Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | — |
| Size | 25 MB | 9 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Inventio](https://appshunter.io/developer/1803297182) | [Secgin LLC](https://appshunter.io/developer/1536282489) |

## 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 |


### Authenticator

[App page](https://appshunter.io/ios/app/authenticator-2fa-and-passwords/id6788498330)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Keyhaven Pro Weekly | $4.99 | per 7 days |
| Keyhaven Pro Monthly | $9.99 | per month |
| Keyhaven Pro Yearly | $19.99 | per year |
| Keyhaven Pro Yearly | $39.99 | per year |


## Frequently asked questions

### Is Contacts Backup & Sync free?

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

### Is Authenticator free?

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

### Do Contacts Backup & Sync or Authenticator have ads?

Neither Contacts Backup & Sync nor Authenticator shows ads.

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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.*