Comparison

Keyguard 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

Keyguard

This app streamlines vehicle key management for dealerships using QR codes. It offers a quick and agile system for tracking and organizing keys, improving operational efficiency.

Highlights
  • QR code key management
  • Vehicle key tracking
  • Dealership inventory
  • Agile administration
  • Fast organization
Features
Read full description

Keyguard es una aplicación especialmente diseñada para administrar las llaves de los vehículos en los concesionarios, permitiendo una ágil y rápida administración mediante la utilización de códigos QR.

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

Keyguard3 screens
Hydraulic schemes4 screens

Verdict

The call

The clearest difference is price: Keyguard at Free against Hydraulic schemes's $0.99. Keyguard also leads on in-app purchases (none vs 1). Hydraulic schemes's advantage is rating (5.0 vs 3.0) and update cadence (every 2 weeks vs every 2 months). On ratings volume, ads, device support and iOS requirement 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

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

ReceptionRating · Positive reviews · Number of ratings

Hydraulic schemes holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Keyguard ships an update every 2 months, Hydraulic schemes every 2 weeks. The most recent releases landed on November 2, 2026 and November 12, 2026 respectively.

Scorecard5 real differences · 5 level
Keyguard versus Hydraulic schemes: the parameters behind the verdict, then further details
ParameterKeyguardHydraulic schemes
PriceFree — better$0.99
Rating3.0 (1 ratings)5.0 (1 ratings) — better
Positive reviews—76.9% of reviews
Number of ratings11
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.3 — better11.0
Further details — not scored
Size22 MB10 MB
Age rating4+4+
DeveloperMiguel Maximiliano VanzettiAngel Martinez

Customer experience

Keyguard

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%

Hydraulic schemes

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

In-app purchases

None

Keyguard

No in-app purchases

1 purchases

Hydraulic schemes

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

Questions

Is Keyguard free?
Keyguard is free to download, with no in-app purchases.
Is Hydraulic schemes free?
Hydraulic schemes costs $0.99, and also offers in-app purchases.
Which has better reviews, Keyguard or Hydraulic schemes?
Hydraulic schemes is rated higher. Keyguard averages 3.0 out of 5 from 1 ratings, while Hydraulic schemes averages 5.0 from 1 ratings.
Do Keyguard or Hydraulic schemes have ads?
Neither Keyguard nor Hydraulic schemes shows ads.
Which is updated more often, Keyguard or Hydraulic schemes?
Keyguard ships an update every 2 months, and Hydraulic schemes every 2 weeks. Most recently, Keyguard was updated on November 2, 2026 and Hydraulic schemes on November 12, 2026.

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