# Thorium vs Cipher Contact Sync

The clearest difference is update cadence: Cipher Contact Sync at every 3 weeks against Thorium's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Thorium ships an update every 3 months, Cipher Contact Sync every 3 weeks. The most recent releases landed on October 4, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Thorium | Cipher Contact Sync |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 157 MB | 27 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CBL solutions bvba](https://appshunter.io/developer/1396744719) | [Innervate Services B.V.](https://appshunter.io/developer/639593980) |

## What reviewers say

### Thorium

[App page](https://appshunter.io/ios/app/thorium/id1396744720)

**Features:** macOS Compatibility

**In-app purchases:** none


### Cipher Contact Sync

[App page](https://appshunter.io/ios/app/cipher-contact-sync/id1624716511)

**In-app purchases:** none


## Frequently asked questions

### Is Thorium free?

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

### Is Cipher Contact Sync free?

Cipher Contact Sync is free to download, with no in-app purchases.

### Do Thorium or Cipher Contact Sync have ads?

Neither Thorium nor Cipher Contact Sync shows ads.

### Which is updated more often, Thorium or Cipher Contact Sync?

Thorium ships an update every 3 months, and Cipher Contact Sync every 3 weeks. Most recently, Thorium was updated on October 4, 2026 and Cipher Contact Sync on October 9, 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.*