Comparison

Si vs D

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

Head to head
About

Si

Instantly and accurately displays numerous measurements like pressure and temperature for specific devices. It supports long-range Bluetooth connectivity and can store and update approximately 120 refrigerants, including environmentally friendly options.

Highlights
  • Real-time measurement display
  • Bluetooth 4.2 connectivity (up to 30m)
  • Storage for ~120 refrigerants
  • Environmentally friendly refrigerant support
  • Updateable refrigerant database
Read full description

This App is used to instantly and accurately display numerous measurements, including pressure, temperature, etc., for the Si-RM3, Si-RM13, Si-RV3, and Si-RM1. It comes with long-range low-energy Bluetooth® 4.2 up to 30 meters (98 ft) and the ability to store and update approximately 120 refrigerants, including environmentally-friendly low global warming potential (GWP) and natural refrigerants.

About

D

Features
Read full description

Not only a simple software, but your new and irreplaceable work partner! With D-TEC you can manage work reports for technical and maintenance assistances on smartphone and tablet. Fill out the reports of the work carried out on the spot and then share them in the Cloud with your team of technicians and with those in the office. D-TEC also works offline and without connection, so you can work anywhere and forget about work reports on paper forever. The system is fully customizable and modificable according to your needs, whether you need to add a fields, modify the interface or customize a print, and if you need it, D-TEC can connect also with you management software. With D-TEC you can: • Plan your work • Work wherever also offline • Export your data in Excel • Have your clients sign your work reports • Send the reports by Email • Manage the work hours • Generate quickly summary on hours worked and product used • Coordinate more technicians • Manage different systems for each customer and much more!

Screenshots

Si4 screens
D4 screens

Verdict

The call

The clearest difference is update cadence: D at every 3 weeks against Si's every 2 months. Si's advantage is iOS requirement (12.4 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

Si ships an update every 2 months, D every 3 weeks. The most recent releases landed on June 2, 2026 and September 24, 2026 respectively.

Scorecard2 real differences · 8 level
Si versus D: the parameters behind the verdict, then further details
ParameterSiD
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews33.3% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.4 — better15.0
Further details — not scored
Size87 MB24 MB
Age rating4+4+
DeveloperSAUERMANN INDUSTRIEdavide Sbreviglieri

In-app purchases

None

Si

No in-app purchases

None

D

No in-app purchases

Questions

Is Si free?
Si is free to download, with no in-app purchases.
Is D free?
D is free to download, with no in-app purchases.
Do Si or D have ads?
Neither Si nor D shows ads.
Which is updated more often, Si or D?
Si ships an update every 2 months, and D every 3 weeks. Most recently, Si was updated on June 2, 2026 and D on September 24, 2026.

Other comparisons