# Contacts + Sync Google, Backup vs OLM Viewer

The clearest difference is ads: OLM Viewer at none against Contacts + Sync Google, Backup's shown. OLM Viewer also leads on device support (4 vs 1) and iOS requirement (15.0 vs 17.6). Contacts + Sync Google, Backup's advantage is update cadence (every 5 days vs every 3 weeks). On price and in-app purchases there is nothing between them.

Both are free to download. Contacts + Sync Google, Backup sells 3 in-app purchases, starting at $2.99 per 7 days and OLM Viewer sells 2 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Contacts + Sync Google, Backup ships an update every 5 days, OLM Viewer every 3 weeks. The most recent releases landed on October 23, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Contacts + Sync Google, Backup | OLM Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/contacts-plus-sync-google-backup/id6755145263/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 34 MB | 29 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [ERVI FIRST LLC](https://appshunter.io/developer/1620705094) | [OMER FARUK KIZILTUG](https://appshunter.io/developer/1870337585) |

## What reviewers say

### Contacts + Sync Google, Backup

[App page](https://appshunter.io/ios/app/contacts-plus-sync-google-backup/id6755145263)

Organize your address book with powerful tools for cleaning up duplicates, deleting contacts in bulk, and managing favorites. Syncs seamlessly with Google Contacts and provides timely reminders for important dates. Includes a business card scanner and backup options.

**Highlights:** Bulk contact deletion, Favorite contact management, Google Contacts synchronization, Birthday and event reminders, Business card scanning, Contact backup and export, Duplicate contact detection

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Monthly | $69.99 | per year |
| Upgrade to PRO | $5.99 | one-time |


### OLM Viewer

[App page](https://appshunter.io/ios/app/olm-viewer-reader-and-converter/id6799690415)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $7.99 | per 7 days |
| Yearly Premium | $49.99 | per year |


## Frequently asked questions

### Is Contacts + Sync Google, Backup free?

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

### Is OLM Viewer free?

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

### Do Contacts + Sync Google, Backup or OLM Viewer have ads?

Contacts + Sync Google, Backup shows ads; OLM Viewer does not.

### Which is updated more often, Contacts + Sync Google, Backup or OLM Viewer?

Contacts + Sync Google, Backup ships an update every 5 days, and OLM Viewer every 3 weeks. Most recently, Contacts + Sync Google, Backup was updated on October 23, 2026 and OLM Viewer on October 31, 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.*