# SafetyEngine vs DELTAPLAN Stempel

SafetyEngine and DELTAPLAN Stempel are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

SafetyEngine ships an update every 3 weeks, DELTAPLAN Stempel every 4 weeks. The most recent releases landed on September 2, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | SafetyEngine | DELTAPLAN Stempel |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Size | 191 MB | 21 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ramboll A/S](https://appshunter.io/developer/1522256210) | [DELTAPLAN ApS](https://appshunter.io/developer/1185469116) |

## What reviewers say

### SafetyEngine

[App page](https://appshunter.io/ios/app/safetyengine/id1598288000)

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

**In-app purchases:** none


### DELTAPLAN Stempel

[App page](https://appshunter.io/ios/app/deltaplan-stempel-ur/id6449742483)

**In-app purchases:** none


## Frequently asked questions

### Is SafetyEngine free?

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

### Is DELTAPLAN Stempel free?

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

### Do SafetyEngine or DELTAPLAN Stempel have ads?

Neither SafetyEngine nor DELTAPLAN Stempel shows ads.

### Which is updated more often, SafetyEngine or DELTAPLAN Stempel?

SafetyEngine ships an update every 3 weeks, and DELTAPLAN Stempel every 4 weeks. Most recently, SafetyEngine was updated on September 2, 2026 and DELTAPLAN Stempel on September 8, 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.*