Comparison

Combi Valve Sizer vs Hydraulic schemes

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

Head to head
About

Combi Valve Sizer

This app simplifies the selection of specific HVAC components. It guides users through choosing the correct valve and actuator, calculates flow rates, and assists with presetting and commissioning. Users can also tag components and download reports.

Highlights
  • Guided valve and actuator selection
  • Valve sizing and flow calculation
  • Valve presetting calculation
  • Tagging valve location and designation
  • Commissioning check with reports
  • Data sheet downloads
  • Report sharing
Read full description

Combi Valve Sizer app from Siemens helps to select the right Acvatix PICV (combi valve) and matching actuator easily. Features: - Guided valve and actuator selection - Valve sizing - Calculation of maximum volumetric flow - Calculation of valve presetting - Tagging the valve location and designation - Commissioning check with report - Data sheets download - Sharing of reports and documents

About

Hydraulic schemes

Easily design hydraulic, heating, cooling, and air conditioning schematics. Drag and drop symbols to quickly build your diagrams. Save and edit your work with the PRO version.

Highlights
  • Create hydraulic schemes
  • Drag and drop symbol placement
  • Extensive symbol library
  • Save and edit schemes (PRO)
  • Export as image or PDF
  • Multiple HVAC system support
Read full description

This tool will allow you to create your own hydraulic scheme (heat, cold, air conditioning) quickly and easily, you simply have to select the symbol you want to use, drag and drop it in the desired position. Symbols: Valves: 2, 3 and 4-way, mixing, control, balancing, butterfly, gate, safety, overflow, non-return, thermostatic, pump, flowmeter, meter, flow switch, pressure gauge, air and dirty separator, drain, temperature probe, boiler, heat pump, indoor and outdoor unit, accumulator, inter-accumulator, heat and cold exchanger, collector, thermostat, radiator, underfloor heating, pressure reducer, filter, resistor, sleeve, tap, buffer tank, gas, solar panels, coil, oven, swimming pool, emitters. # BASIC Version # * You can create your scheme with the same symbols as the Version PRO * You can only work with a scheme although you can share it as an image, pdf or file * Once you create a scheme you will no longer be able to open another (they are not saved) # PRO Version # (1 - In-App Purchases) * You will be able to open, edit and save a scheme * Open in the following examples (link) ------------- * More examples: https://drive.google.com/drive/folders/1W6HFnDNsZAZonUlPn5tEPEnbZOuACjxN?usp=sharing

Screenshots

Combi Valve Sizer4 screens
Hydraulic schemes4 screens

Verdict

The call

The clearest difference is review sentiment: Hydraulic schemes at 77% against Combi Valve Sizer's 0%. Hydraulic schemes also leads on update cadence (every 2 weeks vs every 9 months). Combi Valve Sizer's advantage is price (Free vs $0.99) and in-app purchases (none vs 1). On ads 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

Combi Valve Sizer is free to download; Hydraulic schemes costs $0.99 up front. Hydraulic schemes sells 1 one-off in-app purchase. Combi Valve Sizer asks for nothing beyond the download.

UpkeepUpdate frequency

Combi Valve Sizer ships an update every 9 months, Hydraulic schemes every 2 weeks. Both last shipped on October 25, 2026.

Scorecard6 real differences · 4 level
Combi Valve Sizer versus Hydraulic schemes: the parameters behind the verdict, then further details
ParameterCombi Valve SizerHydraulic schemes
PriceFree — better$0.99
Rating—5.0 (1 ratings) — better
Positive reviews0.0% of reviews76.9% of reviews — better
Number of ratings—1 — better
Update frequencyEvery 9 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS7.0 — better11.0
Further details — not scored
Size50 MB10 MB
Age rating4+4+
DeveloperSiemens AGAngel Martinez

Customer experience

Combi Valve Sizer

Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Hydraulic schemes

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews13 reviews
Positive76.9%
Neutral7.7%
Negative15.4%

In-app purchases

None

Combi Valve Sizer

No in-app purchases

1 purchases

Hydraulic schemes

One-time1
  • Remove ads, save/edit diagram$3.99

Questions

Is Combi Valve Sizer free?
Combi Valve Sizer is free to download, with no in-app purchases.
Is Hydraulic schemes free?
Hydraulic schemes costs $0.99, and also offers in-app purchases.
Do Combi Valve Sizer or Hydraulic schemes have ads?
Neither Combi Valve Sizer nor Hydraulic schemes shows ads.
Which is updated more often, Combi Valve Sizer or Hydraulic schemes?
Combi Valve Sizer ships an update every 9 months, and Hydraulic schemes every 2 weeks. Most recently, Combi Valve Sizer was updated on October 25, 2026 and Hydraulic schemes on October 25, 2026.

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