Comparison

16 Relay Controller vs ZZ.surf

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

Head to head

About

16 Relay Controller

Features

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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

About

ZZ.surf

Features

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A tiling web browser

Screenshots

16 Relay Controller3 screens

ZZ.surf1 screens

Verdict

The call

The clearest difference is update cadence: ZZ.surf at every 11 days against 16 Relay Controller's every 34 months. 16 Relay Controller's advantage is iOS requirement (18.6 vs 26.5). 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

16 Relay Controller ships an update every 34 months, ZZ.surf every 11 days. The most recent releases landed on September 18, 2026 and September 20, 2026 respectively.

Scorecard2 real differences · 4 level

16 Relay Controller versus ZZ.surf: the parameters behind the verdict, then further details
Parameter	16 Relay Controller	ZZ.surf
Price	Free	Free
Update frequency	Every 34 months	Every 11 days — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad	iPhone, iPad
Requires iOS	18.6 — better	26.5
Further details — not scored
Size	0 MB	1 MB
Age rating	4+	17+
Developer	Mike Henry	Pierre Carrier

In-app purchases

None

16 Relay Controller

No in-app purchases

None

ZZ.surf

No in-app purchases

Questions

Is 16 Relay Controller free?

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

Is ZZ.surf free?

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

Do 16 Relay Controller or ZZ.surf have ads?

Neither 16 Relay Controller nor ZZ.surf shows ads.

Which is updated more often, 16 Relay Controller or ZZ.surf?

16 Relay Controller ships an update every 34 months, and ZZ.surf every 11 days. Most recently, 16 Relay Controller was updated on September 18, 2026 and ZZ.surf on September 20, 2026.