# Unit Converter and Calc vs Authenticator App | Two Factor

The clearest difference is in-app purchases: Unit Converter and Calc at none against Authenticator App | Two Factor's 4. Authenticator App | Two Factor's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Authenticator App | Two Factor sells 4 in-app purchases, starting at $1.99 per 7 days. Unit Converter and Calc asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Unit Converter and Calc | Authenticator App | Two Factor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/unit-converter-and-calc/id1617794152/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Ad-supported | — |
| Size | 31 MB | 27 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Qtonz infosoft private limited](https://appshunter.io/developer/1548474074) | [Bhadresh Jadav](https://appshunter.io/developer/1887857328) |

## What reviewers say

### Unit Converter and Calc

[App page](https://appshunter.io/ios/app/unit-converter-and-calc/id1617794152)

This app offers a comprehensive suite of conversion tools for everyday needs, including units of length, weight, temperature, and currency. It also functions as a scientific and arithmetic calculator, with specialized calculators for age, EMI, BMI, and more.

**Highlights:** Unit conversion for length, weight, temperature, volume, time, Scientific and arithmetic calculator, Real-time currency and cryptocurrency converter, Age, EMI, BMI, Percentage, GST calculators, History display for previous calculations, Floating calculator for multitasking

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

**In-app purchases:** none


### Authenticator App | Two Factor

[App page](https://appshunter.io/ios/app/authenticator-app-two-factor/id6773094792)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $1.99 | per 7 days |
| Monthly Premium | $4.99 | per month |
| Yearly Premium | $19.99 | per year |
| Lifetime Premium | $24.99 | one-time |


## Frequently asked questions

### Is Unit Converter and Calc free?

Unit Converter and Calc is free to download, with no in-app purchases.

### Is Authenticator App | Two Factor free?

Authenticator App | Two Factor is free to download, with in-app purchases available.

### Do Unit Converter and Calc or Authenticator App | Two Factor have ads?

Unit Converter and Calc shows ads; Authenticator App | Two Factor does not.

### Which is updated more often, Unit Converter and Calc or Authenticator App | Two Factor?

Unit Converter and Calc ships an update every 2 months, and Authenticator App | Two Factor every 2 months. Most recently, Unit Converter and Calc was updated on October 24, 2026 and Authenticator App | Two Factor 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.*