# ProofBox Vault vs Conduck

The clearest difference is in-app purchases: Conduck at none against ProofBox Vault's 1. Conduck also leads on update cadence (every 6 days vs every 4 months) and device support (4 vs 1). ProofBox Vault's advantage is iOS requirement (16.2 vs 26.5). On price and ads there is nothing between them.

Both are free to download. ProofBox Vault sells 1 one-off in-app purchase. Conduck asks for nothing beyond the download.

ProofBox Vault ships an update every 4 months, Conduck every 6 days. The most recent releases landed on November 5, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ProofBox Vault | Conduck |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 days** |
| Size | 2 MB | 71 MB |
| Requires iOS | **16.2** | 26.5 |
| Devices | iPhone | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 9+ | 17+ |
| Developer | [瑞华 张](https://appshunter.io/developer/1608130007) | [GigaDuck OU](https://appshunter.io/developer/1886082040) |

## What reviewers say

### ProofBox Vault

[App page](https://appshunter.io/ios/app/proofbox-vault/id6763721179)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ProofBox Pro | $6.99 | one-time |


### Conduck

[App page](https://appshunter.io/ios/app/conduck/id6773045286)

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is ProofBox Vault free?

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

### Is Conduck free?

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

### Do ProofBox Vault or Conduck have ads?

Neither ProofBox Vault nor Conduck shows ads.

### Which is updated more often, ProofBox Vault or Conduck?

ProofBox Vault ships an update every 4 months, and Conduck every 6 days. Most recently, ProofBox Vault was updated on November 5, 2026 and Conduck on October 25, 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.*