# Crest Security Review vs Complicated problem solving

The clearest difference is update cadence: Complicated problem solving at every 9 days against Crest Security Review's every 3 months. Crest Security Review's advantage is iOS requirement (9.0 vs 14.0). 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.

Crest Security Review ships an update every 3 months, Complicated problem solving every 9 days. The most recent releases landed on October 3, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Crest Security Review | Complicated problem solving |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Size | 22 MB | 48 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [millipedia Limited](https://appshunter.io/developer/632708658) | [Man Hung Sun](https://appshunter.io/developer/1471605573) |

## What reviewers say

### Crest Security Review

[App page](https://appshunter.io/ios/app/crest-security-review/id1406382185)

**Features:** macOS Compatibility

**In-app purchases:** none


### Complicated problem solving

[App page](https://appshunter.io/ios/app/complicated-problem-solving/id1526663206)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Crest Security Review free?

Crest Security Review is free to download, with no in-app purchases.

### Is Complicated problem solving free?

Complicated problem solving is free to download, with no in-app purchases.

### Do Crest Security Review or Complicated problem solving have ads?

Neither Crest Security Review nor Complicated problem solving shows ads.

### Which is updated more often, Crest Security Review or Complicated problem solving?

Crest Security Review ships an update every 3 months, and Complicated problem solving every 9 days. Most recently, Crest Security Review was updated on October 3, 2026 and Complicated problem solving on October 6, 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.*