# Dual Flip Clock vs Blackwing Vault

The clearest difference is rating: Dual Flip Clock at 5.0 against Blackwing Vault's 4.5. Dual Flip Clock also leads on in-app purchases (none vs 1) and update cadence (every 10 days vs every 2 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Blackwing Vault sells 1 one-off in-app purchase. Dual Flip Clock asks for nothing beyond the download.

Dual Flip Clock holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

Dual Flip Clock ships an update every 10 days, Blackwing Vault every 2 months. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Dual Flip Clock | Blackwing Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/dual-flip-clock/id6766014702/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/blackwing-vault-document-safe/id6775084783/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 18 MB | 54 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [路 林](https://appshunter.io/developer/1896152952) | [Raven Vector](https://appshunter.io/developer/1896521088) |

## What reviewers say

### Dual Flip Clock

[App page](https://appshunter.io/ios/app/dual-flip-clock/id6766014702)

Transform an old phone into a stylish desktop clock with this app. Easily switch between time zones for different cities or schools, and enjoy automatic day and night modes for a comfortable viewing experience.

**Highlights:** Desktop clock conversion, Multiple city/school time zones, Vertical and horizontal layouts, Automatic Day/Night Modes, Customizable display

**Features:** Vision Pro support

**In-app purchases:** none


### Blackwing Vault

[App page](https://appshunter.io/ios/app/blackwing-vault-document-safe/id6775084783)

Securely store and organize essential life details locally on your device. This app offers encrypted storage for IDs, medical records, travel documents, and more, with optional iCloud sync for cross-device access. Keep your private information protected and readily available.

**Highlights:** Local-first encrypted vault, Optional iCloud sync, Biometric/credential unlock, Templates for life details, Secure photo attachments, Expiration review, Privacy report

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| English | $9.99 | one-time |


## Frequently asked questions

### Is Dual Flip Clock free?

Dual Flip Clock is free to download, with no in-app purchases.

### Is Blackwing Vault free?

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

### Which has better reviews, Dual Flip Clock or Blackwing Vault?

Dual Flip Clock is rated higher. Dual Flip Clock averages 5.0 out of 5 from 2 ratings, while Blackwing Vault averages 4.5 from 2 ratings.

### Do Dual Flip Clock or Blackwing Vault have ads?

Neither Dual Flip Clock nor Blackwing Vault shows ads.

### Which is updated more often, Dual Flip Clock or Blackwing Vault?

Dual Flip Clock ships an update every 10 days, and Blackwing Vault every 2 months. Most recently, Dual Flip Clock was updated on October 31, 2026 and Blackwing Vault on November 10, 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.*