# Password 4 Pro vs Twin

The clearest difference is price: Password 4 Pro at Free against Twin's $1.99. Twin's advantage is rating (5.0 vs 2.5) and in-app purchases (none vs 3). On update cadence, device support and iOS requirement there is nothing between them.

Password 4 Pro is free to download; Twin costs $1.99 up front. Password 4 Pro sells 3 in-app purchases, starting at $0.99 per month. Twin asks for nothing beyond the download.

Twin holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 2 and 8 respectively. Written reviews point the same way: 44% of Password 4 Pro's written reviews are positive against 76% of Twin's.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Password 4 Pro | Twin |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [2.5 (2 ratings)](https://appshunter.io/ios/app/password-4-pro/id570632076/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/twin-calc/id1619292082/reviews)** |
| Number of ratings | 2 | **8** |
| Positive reviews | 44.3% of reviews | **76.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 13 MB | 1 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Gerinn LLC](https://appshunter.io/developer/537042831) | [Hiroyuki Ueda](https://appshunter.io/developer/473279916) |

## What reviewers say

### Password 4 Pro

[App page](https://appshunter.io/ios/app/password-4-pro/id570632076)

Securely manage all your passwords and sensitive information with military-level encryption. This app offers local backups, a secure notebook, and the ability to store images like credit cards. It features biometric unlock and an anti-screenshot function for enhanced privacy.

**Highlights:** Local data backup, Secure notebook, Save image information, Generate random passwords, Biometric unlock, Anti-screenshot

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Quarterly | $1.99 | per 3 months |
| Annual | $5.99 | per year |


### Twin

[App page](https://appshunter.io/ios/app/twin-calc/id1619292082)

This app combines two calculators into one, allowing for side-by-side or stacked calculations. Easily copy and paste results between calculators or to other apps. It displays formulas for clarity and handles basic arithmetic operations.

**Highlights:** Two calculators in one, Side-by-side and stacked display, One-touch copy/paste between calculators, Copy results to iPhone memory, Formula display, Basic arithmetic operations

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Password 4 Pro free?

Password 4 Pro is free to download, with in-app purchases available.

### Is Twin free?

Twin costs $1.99, with no in-app purchases.

### Which has better reviews, Password 4 Pro or Twin?

Twin is rated higher. Password 4 Pro averages 2.5 out of 5 from 2 ratings, while Twin averages 5.0 from 8 ratings.

### Do Password 4 Pro or Twin have ads?

Password 4 Pro shows ads; Twin does not.

### Which is updated more often, Password 4 Pro or Twin?

Password 4 Pro ships an update fortnightly, and Twin fortnightly. Most recently, Password 4 Pro was updated on October 20, 2026 and Twin on October 25, 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.*