Comparison

Password 4 Pro vs Twin

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Password 4 Pro

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
Read full description

******* Password Management Expert ******* Too many password to remember? Worried about the safety of your password? With Password 4, there are no more such problems! We do not store any password of users’. Instead, the password backup will be done by Documents App. In the first generation product, we have collected many feedbacks from users. And in Password 4, we have updated the interface and make a brand new password management tool. We have applied military-level encryption algorithm and nobody may crack the password for the database exported or the data backed up in Documents App. You only need to remember a simple 4 digit password. Functions: 1. The program itself will not connect to the internet while local back up is in operation. 2. Local data backup 3. Secure notebook to record private words 4. Save image information including password security card, credit cards, etc. 5. Customize categories 6. Generate random password automatically 7. Customize the format of classified information. Features: • Biometric Unlock • Backstage anti-screenshot • Optimized for iOS 17

About

Twin

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
Read full description

A simple and easy-to-use calculator app that combines two calculators into one. Calculators are displayed side by side when the screen is horizontal, and vertically when the screen is vertical. In addition to being able to perform separate calculations with each calculator, calculation results can be also copy and paste with one touch, so you can perform other calculations during calculations, making it even more convenient to use than you might imagine. There is also a free version with ads. Please try it first. https://apps.apple.com/jp/app/t-calc-lite/id1630026837?l=jp 【feature】 1. Calculation results can be copy and paste between two calculators with one touch. 2. The result calculated can be input from one calculator to the other with one touch. ・When press the "→" key, the calculation result of the left calculator is entered at the end of the formula on the right calculator. ・When press the "←" key, the calculation result of the right calculator is entered at the end of the formula on the left calculator. 3. add, subtract, multiply and divide is performed. Do multiplication and division first, then add and subtract. 4. Display the formula The entered formula is displayed under the result, so you can easily check the operations. 5. Calculation results can be copied to iPhone’s memory Calculation results can be pasted into other apps as text , so transcription errors will not occur. Example of use When you find a product for 988 yen for 3 pieces and a product for 1245 yen for 4 pieces while shopping, you can easily calculate "Which is cheaper?" And “How cheaper?"with this calculator. 1) Use the left and right calculators to find the unit price of the product (unit price = product price/number). 2) Tap the "- key" and "arrow key" on either the left or right calculator to calculate the unit price difference. Limitations ・Answer can be calculated up to 9 digits, minimum 0.000000001. Note The free version can be downloaded from https://apps.apple.com/jp/app/t-calc-lite/id1630026837?l=en

Screenshots

Password 4 Pro4 screens
Twin4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard7 real differences · 3 level
Password 4 Pro versus Twin: the parameters behind the verdict, then further details
ParameterPassword 4 ProTwin
PriceFree — better$1.99
Rating2.5 (2 ratings)5.0 (8 ratings) — better
Positive reviews44.3% of reviews76.0% of reviews — better
Number of ratings28 — better
Update frequencyFortnightlyFortnightly
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.015.0
Further details — not scored
Size13 MB1 MB
Age rating4+4+
DeveloperGerinn LLCHiroyuki Ueda

Customer experience

Password 4 Pro

All ratings2 ratings
Positive0.0%
Neutral50.0%
Negative50.0%
Written reviews149 reviews
Positive44.3%
Neutral11.4%
Negative44.3%

Twin

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews25 reviews
Positive76.0%
Neutral4.0%
Negative20.0%

In-app purchases

3 purchases

Password 4 Pro

Subscriptions3
  • Monthly$0.991 Month
  • Quarterly$1.993 Months
  • Annual$5.991 Year
None

Twin

No in-app purchases

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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