# Sign vs ezModbus

The clearest difference is price: Sign at Free against ezModbus's $4.99. Sign also leads on update cadence (every 4 months vs every 41 months) and iOS requirement (8.0 vs 17.0). ezModbus's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

Sign is free to download; ezModbus costs $4.99 up front. Sign sells 1 one-off in-app purchase. ezModbus asks for nothing beyond the download.

Sign ships an update every 4 months, ezModbus every 41 months. The most recent releases landed on October 7, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Sign | ezModbus |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sign-pro/id1178458840/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 41 months |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 2 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Alpha-American](https://appshunter.io/developer/1178458839) | [Bitmakers LLC](https://appshunter.io/developer/1474083419) |

## What reviewers say

### Sign

[App page](https://appshunter.io/ios/app/sign-pro/id1178458840)

Control Alpha and Betabrite LED signs wirelessly from your iOS device. Dictate or type messages, customize text, and send them instantly. Save and share messages, with an optional one-time purchase to activate full functionality.

**Highlights:** Wireless messaging for LED signs, Dictate or type messages, Customize text colors and fonts, Save and re-edit messages, Share messages with other users, Supports most Alpha/Betabrite displays

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Transmit to Sign | $74.99 | one-time |


### ezModbus

[App page](https://appshunter.io/ios/app/ezmodbus/id1474083420)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sign free?

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

### Is ezModbus free?

ezModbus costs $4.99, with no in-app purchases.

### Do Sign or ezModbus have ads?

Neither Sign nor ezModbus shows ads.

### Which is updated more often, Sign or ezModbus?

Sign ships an update every 4 months, and ezModbus every 41 months. Most recently, Sign was updated on October 7, 2026 and ezModbus on October 13, 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.*