# D4503 vs EARL

The clearest difference is iOS requirement: D4503 at 9.0 against EARL's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

D4503 ships an update every 7 months, EARL every 6 months. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | D4503 | EARL |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 months** |
| Monetization | Free | — |
| Size | 69 MB | 39 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Microframe Corp](https://appshunter.io/developer/624655188) | [ElanCité](https://appshunter.io/developer/1484940351) |

## What reviewers say

### D4503

[App page](https://appshunter.io/ios/app/d4503/id1436986901)

Control Microframe's WiFi-enabled LED Stop Lights with this user-friendly app. Easily set up and manage one or multiple lights for various applications like business lobbies, churches, or classrooms. It facilitates communication over your local WiFi network.

**Highlights:** WiFi Stop Light control, Simple setup, Manage multiple lights, Local WiFi network communication, Business lobby use, Classroom time management

**Features:** macOS Compatibility

**In-app purchases:** none


### EARL

[App page](https://appshunter.io/ios/app/earl-smart-traffic-light/id6450411090)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is D4503 free?

D4503 is free to download, with no in-app purchases.

### Is EARL free?

EARL is free to download, with no in-app purchases.

### Do D4503 or EARL have ads?

Neither D4503 nor EARL shows ads.

### Which is updated more often, D4503 or EARL?

D4503 ships an update every 7 months, and EARL every 6 months. Most recently, D4503 was updated on October 12, 2026 and EARL on October 5, 2026.

---

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