# Millimeter Pro vs Message Keyword Filter

The clearest difference is rating: Message Keyword Filter at 5.0 against Millimeter Pro's 4.4. Message Keyword Filter also leads on price ($0.99 vs $3.99). Millimeter Pro's advantage is in-app purchases (none vs 1) and review sentiment (58% vs 29%). On update cadence, ads and monetization model there is nothing between them.

Millimeter Pro costs $3.99 and Message Keyword Filter $0.99 up front. Message Keyword Filter sells 1 one-off in-app purchase. Millimeter Pro asks for nothing beyond the download.

Message Keyword Filter holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Millimeter Pro has 109 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 58% of Millimeter Pro's written reviews are positive against 29% of Message Keyword Filter's, so the app with the better star average is not the one people write more warmly about.

Millimeter Pro ships an update every 4 months, Message Keyword Filter every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Millimeter Pro | Message Keyword Filter |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| Rating | [4.4 (109 ratings)](https://appshunter.io/ios/app/millimeter-pro-screen-ruler/id631810777/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/message-keyword-filter/id1672730162/reviews)** |
| Number of ratings | **109** | 1 |
| Positive reviews | **57.9% of reviews** | 28.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free | Free |
| Best chart rank | **#186** | — |
| Size | 24 MB | 15 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [VisTech.Projects LLC](https://appshunter.io/developer/620969851) | [Planeta Pigra Co., Ltd.](https://appshunter.io/developer/1738642017) |

## What reviewers say

### Millimeter Pro

[App page](https://appshunter.io/ios/app/millimeter-pro-screen-ruler/id631810777)

**Currently charting:** #186 Top Paid · Utilities (US App Store)

This app transforms your device into a versatile measuring tool. It allows for precise measurements of length, area, diameter, and angles using the touchscreen. Easily split objects into equal parts and switch between millimeters and inches for your convenience.

**Highlights:** Touchscreen ruler and tape measure, Measure length, area, diameter, and angles, Split objects into equal parts, Supports millimeters and inches, Estimate radius, Thread pitch gauge

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

**In-app purchases:** none


### Message Keyword Filter

[App page](https://appshunter.io/ios/app/message-keyword-filter/id1672730162)

This utility helps manage SMS messages by filtering content based on keywords and senders. It utilizes iOS system extensions for secure, private message classification without data leakage.

**Highlights:** Keyword-based SMS filtering, Sender-specific filtering, Automatic message classification, Secure iOS system extensions, Privacy protection, Easy-to-use interface

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support developer | $2.99 | one-time |


## Frequently asked questions

### Is Millimeter Pro free?

Millimeter Pro costs $3.99, with no in-app purchases.

### Is Message Keyword Filter free?

Message Keyword Filter costs $0.99, and also offers in-app purchases.

### Which has better reviews, Millimeter Pro or Message Keyword Filter?

Message Keyword Filter is rated higher. Millimeter Pro averages 4.4 out of 5 from 109 ratings, while Message Keyword Filter averages 5.0 from 1 ratings.

### Do Millimeter Pro or Message Keyword Filter have ads?

Neither Millimeter Pro nor Message Keyword Filter shows ads.

### Which is updated more often, Millimeter Pro or Message Keyword Filter?

Millimeter Pro ships an update every 4 months, and Message Keyword Filter every 2 months. Most recently, Millimeter Pro was updated on October 24, 2026 and Message Keyword Filter 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.*