# TwinKey vs Calculator Pro App

The clearest difference is in-app purchases: Calculator Pro App at none against TwinKey's 6. TwinKey's advantage is update cadence (monthly vs every 19 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. TwinKey sells 6 one-off in-app purchases. Calculator Pro App asks for nothing beyond the download.

TwinKey ships an update monthly, Calculator Pro App every 19 months. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | TwinKey | Calculator Pro App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/twinkey-two-factor-security/id6450484235/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 19 months |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 35 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Artem Bolotov](https://appshunter.io/developer/901756576) | [Mediology Software Private Limited](https://appshunter.io/developer/415229805) |

## What reviewers say

### TwinKey

[App page](https://appshunter.io/ios/app/twinkey-two-factor-security/id6450484235)

This app securely stores and manages your authentication codes for two-factor authentication. It offers easy setup through QR code scanning or manual entry, with options to migrate from other authenticator apps and perform backups. The interface is designed for simplicity and efficiency.

**Highlights:** Secure data storage in Keychain, Easy account setup via QR code or manual entry, Migration from Google Authenticator, Full or partial backup and restore, Simple, efficient user interface

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support the Developer — Small | $0.99 | one-time |
| Support the Developer — Medium | $0.99 | one-time |
| Support the Developer — Light | $0.99 | one-time |
| Support the Developer | $5.99 | one-time |
| Support the Developer — Large | $9.99 | one-time |
| Support the Developer — Extra | $59.99 | one-time |


### Calculator Pro App

[App page](https://appshunter.io/ios/app/calculator-pro-app/id6477689104)

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

**In-app purchases:** none


## Frequently asked questions

### Is TwinKey free?

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

### Is Calculator Pro App free?

Calculator Pro App is free to download, with no in-app purchases.

### Do TwinKey or Calculator Pro App have ads?

Neither TwinKey nor Calculator Pro App shows ads.

### Which is updated more often, TwinKey or Calculator Pro App?

TwinKey ships an update monthly, and Calculator Pro App every 19 months. Most recently, TwinKey was updated on October 8, 2026 and Calculator Pro App on October 7, 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.*