Comparison

Zeliox ZAI4 vs Tru

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

Head to head
About

Zeliox ZAI4

Features
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This APP is designed for Zeliox products to: 1) help users know the device status and data in real time; 2) provide the latest firmware and configuration file; 3) provide wider usage for Zeliox products. Overall, this APP will be a great tool for you to use your Zeliox products. We hope you will always enjoy using Zeliox products.

About

Tru

Features
Read full description

Complete camper and RV heating management, designed for iOS โ€” with a dark Overview dashboard, history charts, Apple Watch, CarPlay, a Home Screen widget and a Lock Screen Live Activity. External hardware required: a self-hosted MQTT/BLE gateway device, configured and provided by the user (not included, not manufactured or sold by MF-Lab). CONTROL FROM YOUR IPHONE See everything at a glance on the Overview screen and tap a card to change it. Choose Bluetooth for local, offline control or MQTT for remote access from anywhere. โ€ข Dual connectivity: Bluetooth (BLE) and MQTT โ€ข Inside temperature with set point and a 6-hour chart โ€ข Hot water half-moon gauge from 0 to 70 ยฐC, with OFF / ECO / HIGH / BOOST โ€ข Heating modes OFF / ECO / HIGH โ€ข Energy mix selection: Gas, Electric or Mix, with power level โ€ข Battery voltage with a charge estimate, or GRID when on shore power โ€ข Detailed error code explanations โ€ข Buttons that always follow the state reported by your gateway โ€ข Built-in Help with setup, controls and troubleshooting HISTORY Follow inside temperature, water temperature and battery voltage over 1 hour, 6 hours, 24 hours or 7 days. Data is recorded while the app is connected, including in the background, and gaps are shown as gaps. An Energy Source chart shows how long each setting was selected. History is stored on your device only. ON YOUR WRIST A dedicated Apple Watch app shows inside temperature and hot water side by side, with battery and energy source, and lets you adjust the room temperature, heating mode and hot water with large buttons that show the active setting. Get an alert right on your wrist the moment something needs attention. IN THE CAR Check your camper's status from the CarPlay screen: large colored cards for inside temperature, hot water, battery and energy, plus connection details, laid out for a quick glance with minimal distraction. ON YOUR HOME SCREEN AND LOCK SCREEN Add the Tru-Control widget to see your heater's last known status without opening the app, or start the Live Activity to keep temperatures, battery and energy source on your Lock Screen and Dynamic Island while the app is connected. ON IPAD Tru-Control runs as a compact floating window you can place next to other apps. ONE-TIME PURCHASE A single one-time purchase unlocks commands, Apple Watch, CarPlay and the widget. No subscription. You can restore a previous purchase or redeem an offer code from Settings. Tru-Control is an independent, unofficial application and is not affiliated with, endorsed by, or sponsored by any heating system manufacturer. This app uses the standard Apple End User License Agreement (EULA), available here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Zeliox ZAI43 screens
Tru4 screens

Verdict

The call

The clearest difference is in-app purchases: Zeliox ZAI4 at none against Tru's 3. Zeliox ZAI4 also leads on iOS requirement (12.0 vs 18.2). Tru's advantage is update cadence (weekly vs every 7 months). On price, ads and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Tru sells 3 in-app purchases, starting at $1.99 per month. Zeliox ZAI4 asks for nothing beyond the download.

UpkeepUpdate frequency

Zeliox ZAI4 ships an update every 7 months, Tru weekly. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

Scorecard3 real differences ยท 3 level
Zeliox ZAI4 versus Tru: the parameters behind the verdict, then further details
ParameterZeliox ZAI4Tru
PriceFreeFree
Update frequencyEvery 7 monthsWeekly โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPodiPhone, iPad, Apple Watch โ€” better
Requires iOS12.0 โ€” better18.2
Further details โ€” not scored
Size34 MB7 MB
Age rating17+4+
DeveloperZelioxMarco Frigerio

In-app purchases

None

Zeliox ZAI4

No in-app purchases

3 purchases

Tru

Subscriptions2
  • Tru-Control Monthly Subscription7 Days trial$1.991 Month
  • Tru-Control Annual Subscription$17.991 Year
One-time1
  • Tru-Control Lifetime$5.99

Questions

Is Zeliox ZAI4 free?
Zeliox ZAI4 is free to download, with no in-app purchases.
Is Tru free?
Tru is free to download, with in-app purchases available.
Do Zeliox ZAI4 or Tru have ads?
Neither Zeliox ZAI4 nor Tru shows ads.
Which is updated more often, Zeliox ZAI4 or Tru?
Zeliox ZAI4 ships an update every 7 months, and Tru weekly. Most recently, Zeliox ZAI4 was updated on October 27, 2026 and Tru on October 31, 2026.

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