# App Secret Pro vs Shift Unit

The clearest difference is review sentiment: Shift Unit at 100% against App Secret Pro's 42%. Shift Unit also leads on price (Free vs $3.99) and rating (5.0 vs 4.4). App Secret Pro's advantage is ratings volume (122 vs 21). On update cadence, ads, device support and iOS requirement there is nothing between them.

Shift Unit is free to download; App Secret Pro costs $3.99 up front. App Secret Pro sells 3 in-app purchases, starting at $1.99 per month. Shift Unit asks for nothing beyond the download.

Shift Unit holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: App Secret Pro has 122 ratings behind it against 21, so its average is the more settled of the two. Written reviews point the same way: 42% of App Secret Pro's written reviews are positive against 100% of Shift Unit's.

App Secret Pro ships an update monthly, Shift Unit every 2 months. The most recent releases landed on September 30, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | App Secret Pro | Shift Unit |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [4.4 (122 ratings)](https://appshunter.io/ios/app/app-secret-pro/id572225713/reviews) | **[5.0 (21 ratings)](https://appshunter.io/ios/app/shift-unit/id1514037983/reviews)** |
| Number of ratings | **122** | 21 |
| Positive reviews | 41.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 87 MB | 20 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Felix Yew](https://appshunter.io/developer/505904424) | [Didier Burton](https://appshunter.io/developer/1514037982) |

## What reviewers say

### App Secret Pro

[App page](https://appshunter.io/ios/app/app-secret-pro/id572225713)

Securely store photos, videos, notes, contacts, and voice memos with multiple lock options. Protect your private data from unauthorized access with customizable security layers and features like decoy mode.

**Highlights:** Multiple lock styles (passcode, combination, dot-pattern), Private photo and video albums, Secure notes with lockable folders, Protected reminders, Voice memo recording and playback, Private contact management, Break-in reports and decoy mode

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iCloud Sync Monthly | $1.99 | per month |
| iCloud Sync Yearly | $12.99 | per year |
| Reset Password | $1.99 | one-time |

**What reviewers like**

- 👍 Great app, very useful
- 🔒 Good privacy features
- ✨ Improved after updates
- 👍 User-friendly interface
- 🌟 Best app of its kind

**What reviewers complain about**

- 🐛 App crashes frequently
- 🐛 App won't open
- 🐛 Data loss issues
- 🐛 Import/upload errors
- 🐛 Slow performance

**Reported bugs**

- Importing video does nothing
- Deleted all photos
- App cannot be opened
- App won't even open
- Privacy policy concerns (data collection)

**Requested features**

- Import notes and contacts directly from iPhone
- Ability to reorder files
- Login with fingerprints
- Continuous shooting on built-in camera
- Touch ID support


### Shift Unit

[App page](https://appshunter.io/ios/app/shift-unit/id1514037983)

This utility app offers precise unit and currency conversions with over 1400 units across 34 categories. It supports light/dark modes, home widgets, and an independent Apple Watch app. Features include a custom keypad with calculator mode and educational Wikipedia integration.

**Highlights:** 1400+ conversion units, 34 categories, Light/dark mode support, Home widget, Apple Watch app, Custom keypad with calculator, Wikipedia integration

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is App Secret Pro free?

App Secret Pro costs $3.99, and also offers in-app purchases.

### Is Shift Unit free?

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

### Which has better reviews, App Secret Pro or Shift Unit?

Shift Unit is rated higher. App Secret Pro averages 4.4 out of 5 from 122 ratings, while Shift Unit averages 5.0 from 21 ratings.

### Do App Secret Pro or Shift Unit have ads?

Neither App Secret Pro nor Shift Unit shows ads.

### Which is updated more often, App Secret Pro or Shift Unit?

App Secret Pro ships an update monthly, and Shift Unit every 2 months. Most recently, App Secret Pro was updated on September 30, 2026 and Shift Unit on September 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.*