Comparison

IOBluetoothLE vs 16 Relay Controller

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

Head to head

About

IOBluetoothLE

Features

Read full description

This allows control of the Devantech BT004BLE module which has 4 16 amp relays. It allows you to configure the modules name and password, as well as setting individual names and pulse times for each relay. https://www.robot-electronics.co.uk/bt004ble.html

About

16 Relay Controller

Features

Read full description

App to control henry solutions 16 Relay hardware devices. The 16 Relay controller connects to an IOT device via web service calls. The webservice endpoints you connect to is determined by the application settings. The default IP address of the webservice for the relay controller is set to a non-routable IP address of 192.168.4.2. The app only uses http and not https so it is only suitable for controlling IOT devices in a closed environment. The 16 Relay controller is limited to sending only the following URL request to the IP address you enter in the settings: http://[ip-address]/status http://[ip-address]/status/[relay-number] http://[ip-address]/on/[relay-number] http://[ip-address]/off/[relay-number] http://[ip-address]/allon http://[ip-address]/alloff http://[ip-address]/hb

Screenshots

IOBluetoothLE2 screens

16 Relay Controller3 screens

Verdict

The call

The clearest difference is iOS requirement: IOBluetoothLE at 15.5 against 16 Relay Controller's 18.6. On price, update cadence, ads and in-app purchases 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

IOBluetoothLE ships an update every 67 months, 16 Relay Controller every 34 months. The most recent releases landed on September 28, 2026 and October 6, 2026 respectively.

Scorecard1 real difference · 5 level

IOBluetoothLE versus 16 Relay Controller: the parameters behind the verdict, then further details
Parameter	IOBluetoothLE	16 Relay Controller
Price	Free	Free
Update frequency	Every 67 months	Every 34 months — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod — better	iPhone, iPad
Requires iOS	15.5 — better	18.6
Further details — not scored
Size	1 MB	0 MB
Age rating	4+	4+
Developer	Devantech Ltd.	Mike Henry

In-app purchases

None

IOBluetoothLE

No in-app purchases

None

16 Relay Controller

No in-app purchases

Questions

Is IOBluetoothLE free?

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

Is 16 Relay Controller free?

16 Relay Controller is free to download, with no in-app purchases.

Do IOBluetoothLE or 16 Relay Controller have ads?

Neither IOBluetoothLE nor 16 Relay Controller shows ads.

Which is updated more often, IOBluetoothLE or 16 Relay Controller?

IOBluetoothLE ships an update every 67 months, and 16 Relay Controller every 34 months. Most recently, IOBluetoothLE was updated on September 28, 2026 and 16 Relay Controller on October 6, 2026.