# Resistor color decoder vs White Mark Room Acoustics

The clearest difference is in-app purchases: Resistor color decoder at none against White Mark Room Acoustics's 4. White Mark Room Acoustics's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. White Mark Room Acoustics sells 4 in-app purchases, starting at $2.99 per month. Resistor color decoder asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 9 days. The most recent releases landed on September 9, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Resistor color decoder | White Mark Room Acoustics |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | Every 9 days |
| Size | 6 MB | 11 MB |
| Requires iOS | **17.0** | 18.4 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Michal Pajdak](https://appshunter.io/developer/1794089424) | [ANATIDAE LIMITED](https://appshunter.io/developer/1810331324) |

## What reviewers say

### Resistor color decoder

[App page](https://appshunter.io/ios/app/resistor-color-decoder/id6744559438)

**Features:** macOS Compatibility

**In-app purchases:** none


### White Mark Room Acoustics

[App page](https://appshunter.io/ios/app/white-mark-room-acoustics/id6744988622)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| White Mark Pro Monthly | $2.99 | per month |
| White Mark Commercial Monthly | $14.99 | per month |
| White Mark Pro Annual | $24.99 | per year |
| White Mark Commercial Annual | $149.99 | per year |


## Frequently asked questions

### Is Resistor color decoder free?

Resistor color decoder is free to download, with no in-app purchases.

### Is White Mark Room Acoustics free?

White Mark Room Acoustics is free to download, with in-app purchases available.

### Do Resistor color decoder or White Mark Room Acoustics have ads?

Resistor color decoder shows ads; White Mark Room Acoustics does not.

### Which is updated more often, Resistor color decoder or White Mark Room Acoustics?

Resistor color decoder ships an update every 9 days, and White Mark Room Acoustics every 9 days. Most recently, Resistor color decoder was updated on September 9, 2026 and White Mark Room Acoustics on September 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*