# RDM写码器 vs film Dev Timer

The clearest difference is price: RDM写码器 at Free against film Dev Timer's $3.99. RDM写码器 also leads on review sentiment (100% vs 82%) and update cadence (every 6 weeks vs every 4 months). On ads, in-app purchases and device support there is nothing between them.

RDM写码器 is free to download; film Dev Timer costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RDM写码器 ships an update every 6 weeks, film Dev Timer every 4 months. The most recent releases landed on October 1, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | RDM写码器 | film Dev Timer |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/film-dev-timer/id1576065496/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **100.0% of reviews** | 81.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Monetization | **Free** | Paid |
| Size | 23 MB | 7 MB |
| Requires iOS | **8.0** | 14.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [少昌 黄](https://appshunter.io/developer/1482588766) | [家啟 褚](https://appshunter.io/developer/1576063354) |

## What reviewers say

### RDM写码器

[App page](https://appshunter.io/ios/app/rdm/id1487361715)

This utility app simplifies the process of writing DMX512 addresses for lighting fixtures that support the RDM protocol. It offers automatic addressing, address list saving, and sorting functionalities. Users can identify, write, modify channels, and view device information.

**Highlights:** RDM protocol DMX512 address writing, Automatic address writing, Save address lists, Sorting functionality, Identify and modify channels, View device information

**Features:** macOS Compatibility

**In-app purchases:** none


### film Dev Timer

[App page](https://appshunter.io/ios/app/film-dev-timer/id1576065496)

This app assists film photographers in developing black and white film at home. It provides common development data, timing functions, and developer ratios to ensure stable manual processing for a high-quality result.

**Highlights:** Black and white film development guide, Home development timing, Developer ratio information, Process-specific timing, Stable manual processing support, iPhone and iPad compatible

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RDM写码器 free?

RDM写码器 is free to download, with no in-app purchases.

### Is film Dev Timer free?

film Dev Timer costs $3.99, with no in-app purchases.

### Do RDM写码器 or film Dev Timer have ads?

Neither RDM写码器 nor film Dev Timer shows ads.

### Which is updated more often, RDM写码器 or film Dev Timer?

RDM写码器 ships an update every 6 weeks, and film Dev Timer every 4 months. Most recently, RDM写码器 was updated on October 1, 2026 and film Dev Timer 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.*