Comparison

JUMO Device vs 4

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

Head to head
About

JUMO Device

Features
Read full description

The free JUMO Device app allows smartphones and tablets to communicate with the paperless recorder JUMO LOGOSCREEN 600. The app can scan for devices in the company network and displays the discovered devices in an easy-to-read list. Users can select the device either from this list or do so manually by entering the IP address / DNS designation. If a JUMO device is selected via the app, the device tells the app which data it can provide. This data could, for example, include current measured values, events, or alarms. The JUMO Device app also supports the automation system JUMO mTRON T (as of version 249.03.05), the process and program controller JUMO DICON touch (as of version 266.02.03), and the modular multichannel measuring device for liquid analysis JUMO AQUIS touch (as of version 304.02.08). The paperless recorder JUMO LOGOSCREEN 600 is supported as of version 323.01.01.

About

4

This utility app converts between 4-20 mA current signals and temperature readings. It's designed for engineers and technicians to quickly check transmitter scaling, verify loop values, and troubleshoot signal issues in various industrial applications.

Highlights
  • Two-way current to temperature conversion
  • Custom min/max process range
  • Support for negative temperatures
  • Celsius and Fahrenheit support
  • Fast and clean interface
Features
Read full description

4-20 Temperature Calculator is a practical tool for engineers, technicians, and field service professionals working with 4-20 mA transmitters. Use it to quickly convert: • 4-20 mA to temperature • Temperature to 4-20 mA The app helps you work faster in the field by giving you a simple and accurate way to check transmitter scaling, verify loop values, and troubleshoot signal readings. Key features: • Two-way conversion between current and temperature • Custom min/max process range • Support for negative temperature ranges • Celsius and Fahrenheit input/output • Fast, clean interface for everyday use • Useful for HVAC, process control, maintenance, and commissioning work Whether you are calibrating a transmitter, checking a loop, or validating process values, 4-20 Temperature Calculator gives you the numbers you need in seconds.

Screenshots

JUMO Device4 screens
43 screens

Verdict

The call

The clearest difference is update cadence: JUMO Device at every 3 months against 4's every 11 months. JUMO Device also leads on iOS requirement (13.0 vs 15.6). 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

JUMO Device ships an update every 3 months, 4 every 11 months. The most recent releases landed on October 26, 2026 and November 3, 2026 respectively.

Scorecard2 real differences · 7 level
JUMO Device versus 4: the parameters behind the verdict, then further details
ParameterJUMO Device4
PriceFreeFree
Rating—3.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyEvery 3 months — betterEvery 11 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size4 MB30 MB
Age rating4+4+
DeveloperJUMO GmbH & Co. KGMantas Kamarauskas

In-app purchases

None

JUMO Device

No in-app purchases

None

4

No in-app purchases

Questions

Is JUMO Device free?
JUMO Device is free to download, with no in-app purchases.
Is 4 free?
4 is free to download, with no in-app purchases.
Do JUMO Device or 4 have ads?
Neither JUMO Device nor 4 shows ads.
Which is updated more often, JUMO Device or 4?
JUMO Device ships an update every 3 months, and 4 every 11 months. Most recently, JUMO Device was updated on October 26, 2026 and 4 on November 3, 2026.

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