Comparison

Vilter Select Lite vs Castel Regolo

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

Head to head
About

Vilter Select Lite

Access your projects and compressor ratings offline with this utility app. Seamlessly sync files between your device and the cloud when an internet connection is available.

Highlights
  • Offline project access
  • Compressor ratings
  • Cloud file syncing
  • On-the-go project management
Features
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Vilter Select Lite provides current Vilter Select users to access their projects on-the-go and provide an offline solution to those users who need compressor ratings but do not have an internet connection for periods of time. When internet connection is available, users will be able to move files between their device and the cloud.

About

Castel Regolo

Features
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The Regolo APP of Castel is able to quickly calculate the relationship between the pressure and the temperature of the most common refrigerant gases in saturation conditions. The app is able to provide for each refrigerant also the thermodynamic qualities of each gas, including the global warming potential (GWP), and the ozone destruction potential (ODP). Within it is also possible to make a direct comparison between two different gases, comparing at the same time the differentiation saturation temperatures relative to a common reference pressure in the same screen view. All calculations in the slide rule were performed using extended curve fit models are based on the results of Refprop. In all zeotropic gases it is also possible to see both the dew point and the bubble point, thus allow the user to calculate the glide value.

Screenshots

Vilter Select Lite3 screens
Castel Regolo3 screens

Verdict

The call

The clearest difference is update cadence: Castel Regolo at monthly against Vilter Select Lite's every 9 months. 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

Vilter Select Lite ships an update every 9 months, Castel Regolo monthly. The most recent releases landed on October 21, 2026 and October 7, 2026 respectively.

Scorecard1 real difference · 8 level
Vilter Select Lite versus Castel Regolo: the parameters behind the verdict, then further details
ParameterVilter Select LiteCastel Regolo
PriceFreeFree
Rating1.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 9 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better11.0
Further details — not scored
Size60 MB18 MB
Age rating4+4+
DeveloperCopeland LPCastel S.r.l.

In-app purchases

None

Vilter Select Lite

No in-app purchases

None

Castel Regolo

No in-app purchases

Questions

Is Vilter Select Lite free?
Vilter Select Lite is free to download, with no in-app purchases.
Is Castel Regolo free?
Castel Regolo is free to download, with no in-app purchases.
Do Vilter Select Lite or Castel Regolo have ads?
Neither Vilter Select Lite nor Castel Regolo shows ads.
Which is updated more often, Vilter Select Lite or Castel Regolo?
Vilter Select Lite ships an update every 9 months, and Castel Regolo monthly. Most recently, Vilter Select Lite was updated on October 21, 2026 and Castel Regolo on October 7, 2026.

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