# DDW SafeKeeping vs Certi

The clearest difference is update cadence: Certi at every 3 days against DDW SafeKeeping's every 7 months. Certi also leads on iOS requirement (15.1 vs 18.5). 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.

DDW SafeKeeping ships an update every 7 months, Certi every 3 days. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | DDW SafeKeeping | Certi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (4 ratings)](https://appshunter.io/ios/app/certi-lock/id6745152014/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 days** |
| Monetization | — | Free |
| Size | 53 MB | 39 MB |
| Requires iOS | 18.5 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Cashlink Technologies GmbH](https://appshunter.io/developer/1242008039) | [Scottsdale Mint LLLP](https://appshunter.io/developer/1078693720) |

## What reviewers say

### DDW SafeKeeping

[App page](https://appshunter.io/ios/app/ddw-safekeeping/id6738392006)

**Features:** macOS Compatibility

**In-app purchases:** none


### Certi

[App page](https://appshunter.io/ios/app/certi-lock/id6745152014)

This app uses synthetic DNA technology to authenticate precious metals, providing instant verification of gold and silver investments. Scan a card to see factory-sealed photos and confirm the authenticity of your items, ensuring peace of mind for investors.

**Highlights:** Synthetic DNA authentication, Barcode scanning, Factory-sealed product photos, Tamper-evident seal verification, Collection tracking, Instant results, Dark mode

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DDW SafeKeeping free?

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

### Is Certi free?

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

### Do DDW SafeKeeping or Certi have ads?

Neither DDW SafeKeeping nor Certi shows ads.

### Which is updated more often, DDW SafeKeeping or Certi?

DDW SafeKeeping ships an update every 7 months, and Certi every 3 days. Most recently, DDW SafeKeeping was updated on October 1, 2026 and Certi on October 12, 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.*