# Fast Convert Unit and Measure vs 2FA authenticator (2Lock)

The clearest difference is ads: 2FA authenticator (2Lock) at none against Fast Convert Unit and Measure's shown. Fast Convert Unit and Measure's advantage is update cadence (weekly vs every 5 months) and iOS requirement (13.0 vs 17.3). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Fast Convert Unit and Measure sells 6 one-off in-app purchases and 2FA authenticator (2Lock) sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Fast Convert Unit and Measure ships an update weekly, 2FA authenticator (2Lock) every 5 months. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Fast Convert Unit and Measure | 2FA authenticator (2Lock) |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (25 ratings)](https://appshunter.io/ios/app/fast-convert-unit-and-measure/id1487858270/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 176 MB | 22 MB |
| Requires iOS | **13.0** | 17.3 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Bruno Bongiovanni](https://appshunter.io/developer/911582662) | [Artem Mykhelson](https://appshunter.io/developer/1520436719) |

## What reviewers say

### Fast Convert Unit and Measure

[App page](https://appshunter.io/ios/app/fast-convert-unit-and-measure/id1487858270)

Easily convert between various units and metrics with a streamlined interface. Quickly access frequently used conversions through automatic shortcuts. Supports over 130 units across 20 categories, with options to customize decimals and reorganize metrics.

**Highlights:** Automatic shortcut creation for frequent units, Customizable number of decimals, Reorganize metric shortcuts, Over 130 units in 20 categories, Streamlined and simple interface, Fast conversion tables for cooking, shoes, and more

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip 10% | $0.99 | one-time |
| Tip 15% | $1.99 | one-time |
| Unlock app | $1.99 | one-time |
| Tip 20% | $2.99 | one-time |
| Tip 20% | $3.99 | one-time |
| Tip 25% | $4.99 | one-time |


### 2FA authenticator (2Lock)

[App page](https://appshunter.io/ios/app/2fa-authenticator-2lock/id6746497626)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Trial | $1.99 | per 7 days |
| 1 Year Unlimited | $19.99 | one-time |
| Forever Unlimited | $39.99 | one-time |


## Frequently asked questions

### Is Fast Convert Unit and Measure free?

Fast Convert Unit and Measure is free to download, with in-app purchases available.

### Is 2FA authenticator (2Lock) free?

2FA authenticator (2Lock) is free to download, with in-app purchases available.

### Do Fast Convert Unit and Measure or 2FA authenticator (2Lock) have ads?

Fast Convert Unit and Measure shows ads; 2FA authenticator (2Lock) does not.

### Which is updated more often, Fast Convert Unit and Measure or 2FA authenticator (2Lock)?

Fast Convert Unit and Measure ships an update weekly, and 2FA authenticator (2Lock) every 5 months. Most recently, Fast Convert Unit and Measure was updated on October 6, 2026 and 2FA authenticator (2Lock) on October 4, 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.*