# Relay | Communicator vs Metric Converter Pro

The clearest difference is price: Relay | Communicator at Free against Metric Converter Pro's $2.99. Relay | Communicator also leads on update cadence (every 2 weeks vs every 3 months). Metric Converter Pro's advantage is review sentiment (100% vs 67%). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Relay | Communicator is free to download; Metric Converter Pro costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Relay | Communicator ships an update every 2 weeks, Metric Converter Pro every 3 months. The most recent releases landed on October 25, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Relay | Communicator | Metric Converter Pro |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.8 (437 ratings)](https://appshunter.io/ios/app/relay-communicator/id1643141011/reviews)** | — |
| Number of ratings | **437** | — |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | **Free** | Paid |
| Size | 86 MB | 4 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Relay, Inc](https://appshunter.io/developer/1221474222) | [Christian Ahrweiler](https://appshunter.io/developer/1069911469) |

## What reviewers say

### Relay | Communicator

[App page](https://appshunter.io/ios/app/relay-communicator/id1643141011)

This app provides two-way communication and location tracking for teams. It includes features like a panic button and work tracking to enhance team performance and operational efficiency.

**Highlights:** Two-way communication, Panic button, GPS tracking, Work tracking, Radio replacement

**In-app purchases:** none


### Metric Converter Pro

[App page](https://appshunter.io/ios/app/metric-converter-pro/id6757891891)

This tool offers instant unit conversions without clutter or ads. It features a one-screen design for quick input and results, supporting a wide range of smart unit groups and common metric and imperial units. It works offline and is ideal for everyday use, travel, work, and school.

**Highlights:** One-screen input and result display, Instant conversion while typing, Smart unit groups, Automatic filtering of compatible units, Works fully offline, No ads, tracking, or subscriptions

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Relay | Communicator free?

Relay | Communicator is free to download, with no in-app purchases.

### Is Metric Converter Pro free?

Metric Converter Pro costs $2.99, with no in-app purchases.

### Do Relay | Communicator or Metric Converter Pro have ads?

Neither Relay | Communicator nor Metric Converter Pro shows ads.

### Which is updated more often, Relay | Communicator or Metric Converter Pro?

Relay | Communicator ships an update every 2 weeks, and Metric Converter Pro every 3 months. Most recently, Relay | Communicator was updated on October 25, 2026 and Metric Converter Pro on October 22, 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.*