Comparison

RSL Central vs MarsMD Toolbox

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

About

RSL Central

Features

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An easy-to-use app to get started with onsemi Bluetooth Low Energy wireless microcontrollers and periphery devices. RSL Central scans for and establishes a Bluetooth Low Energy connection with onsemi Bluetooth Low Energy wireless microcontrollers. The app displays fields such as measured battery level, voltage, current, LED status, push button status, or others depending on the onsemi wireless microcontroller and configuration.

About

MarsMD Toolbox

Features

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MarsMD TolBox is a mobile application to update the firmware of Gauss and Veles metal detectors of the MarsMD brand. The app allows over-the-air firmware image uploading to the device using Bluetooth LE technology. You can download the current version of the firmware (zip file) for your metal detector at the manufacturer's website at www.marsmd.com.

Screenshots

RSL Central4 screens

MarsMD Toolbox4 screens

Verdict

The call

The clearest difference is update cadence: RSL Central at every 3 months against MarsMD Toolbox's every 37 months. MarsMD Toolbox's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

RSL Central ships an update every 3 months, MarsMD Toolbox every 37 months. Both last shipped on October 1, 2026.

Scorecard2 real differences · 4 level

RSL Central versus MarsMD Toolbox: the parameters behind the verdict, then further details
Parameter	RSL Central	MarsMD Toolbox
Price	Free	Free
Update frequency	Every 3 months — better	Every 37 months
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	15.0	12.0 — better
Further details — not scored
Size	1 MB	18 MB
Age rating	4+	17+
Developer	ON SEMICONDUCTOR CORPORATION	ANDRII CHEKHIVSKYI

In-app purchases

None

RSL Central

No in-app purchases

None

MarsMD Toolbox

No in-app purchases

Questions

Is RSL Central free?

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

Is MarsMD Toolbox free?

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

Do RSL Central or MarsMD Toolbox have ads?

Neither RSL Central nor MarsMD Toolbox shows ads.

Which is updated more often, RSL Central or MarsMD Toolbox?

RSL Central ships an update every 3 months, and MarsMD Toolbox every 37 months. Most recently, RSL Central was updated on October 1, 2026 and MarsMD Toolbox on October 1, 2026.