# MyNumberBlocker vs Plain Units

The clearest difference is in-app purchases: MyNumberBlocker at none against Plain Units's 1. MyNumberBlocker also leads on ads (none vs shown) and iOS requirement (13.0 vs 16.4). Plain Units's advantage is update cadence (every 3 weeks vs every 38 months). On price and device support there is nothing between them.

Both are free to download. Plain Units sells 1 one-off in-app purchase. MyNumberBlocker asks for nothing beyond the download.

MyNumberBlocker ships an update every 38 months, Plain Units every 3 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | MyNumberBlocker | Plain Units |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (2 ratings)](https://appshunter.io/ios/app/mynumberblocker/id1288429101/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 38 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 2 MB | 48 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gruby Solutions](https://appshunter.io/developer/452918601) | [Nicolaus Lawson](https://appshunter.io/developer/1029201825) |

## What reviewers say

### MyNumberBlocker

[App page](https://appshunter.io/ios/app/mynumberblocker/id1288429101)

Block unwanted calls from numbers that share the same prefix as your own. This utility prevents telemarketers from spoofing caller IDs to trick you into answering. It ensures your contacts are not blocked and your call logs remain private.

**Highlights:** Block calls by phone number prefix, Prevents caller ID spoofing, Excludes contacts from blocking, Sends blocked calls to voicemail, Does not send contacts to server

**In-app purchases:** none


### Plain Units

[App page](https://appshunter.io/ios/app/plain-units-unit-converter/id6810955046)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is MyNumberBlocker free?

MyNumberBlocker is free to download, with no in-app purchases.

### Is Plain Units free?

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

### Do MyNumberBlocker or Plain Units have ads?

Plain Units shows ads; MyNumberBlocker does not.

### Which is updated more often, MyNumberBlocker or Plain Units?

MyNumberBlocker ships an update every 38 months, and Plain Units every 3 weeks. Most recently, MyNumberBlocker was updated on November 6, 2026 and Plain Units on October 31, 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.*