Comparison

SpanSet Payload Controller vs iVSP

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

Head to head
About

SpanSet Payload Controller

Features
Read full description

Lifting loads is your daily business? SpanSet Payload Controller is your tool of choice to calculate the required load capacity of lashing straps and round slings. It's clear, well-structured user interface makes such calculations a cinch.

About

iVSP

Experience ship navigation with Voith propulsion systems. Explore the mechanics and hydrodynamics of Voith Schneider Propellers (VSP) and their unique thrust capabilities on various vessel types. Learn about the innovative technology behind this propulsion system.

Highlights
  • Steer ships with Voith propulsion
  • Explore Voith Schneider Propeller mechanics
  • Understand VSP hydrodynamics
  • Simulate various vessel types
  • Learn about VSP thrust generation
Features
Read full description

The iVSP app allows users to steer ships equipped with Voith propulsion systems, in particular Voith Schneider Propeller (VSP). These are real ships of various types: Voith Water Tractors (tugs), double-ended ferries, offshore vessels, and yachts. iVSP also provides a deeper insight into the mechanics and hydrodynamics of the Voith Schneider Propeller (VSP) and its unique propeller forces. The VSP enables the fastest generation of thrust in all directions – stepless and precisely. VSPs combine propulsion, steering, and roll stabilization in a single unit, eliminating the need for rudders. Thrust and steering forces can be generated in any direction from zero to maximum. The Voith Schneider Propeller generates thrust by means of profiled blades that protrude from the ship's bottom and rotate around a vertical axis. The blades are mounted in a rotor casing that is flush with the ship's bottom. The rotational movement of the blades around the common vertical axis is superimposed by a local oscillatory movement of the individual propeller blades around their own axis. This oscillatory movement is generated by a kinematic mechanism (kinematics). The Voith Schneider Propeller is based on an idea by Austrian inventor Ernst Schneider, and its effectiveness was first successfully demonstrated in model tests in 1926. The development potential of the VSP is far from exhausted, and Voith engineers are continuously working to further improve its efficiency. In addition, the company is constantly developing new applications for various types of ships for this unique propulsion system. Suggestions for the application and further improvement of the VSP are always welcome. The relevant contact details for Voith can be found in the main menu of iVSP.

Screenshots

SpanSet Payload Controller4 screens
iVSP4 screens

Verdict

The call

The clearest difference is update cadence: SpanSet Payload Controller at every 2 months against iVSP's every 21 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

SpanSet Payload Controller ships an update every 2 months, iVSP every 21 months. The most recent releases landed on May 17, 2026 and September 11, 2026 respectively.

Scorecard1 real difference · 9 level
SpanSet Payload Controller versus iVSP: the parameters behind the verdict, then further details
ParameterSpanSet Payload ControlleriVSP
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 2 months — betterEvery 21 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size7 MB384 MB
Age rating4+4+
DeveloperSpan Set GmbH & Co. KGVoith Digital Solutions Inc

In-app purchases

None

SpanSet Payload Controller

No in-app purchases

None

iVSP

No in-app purchases

Questions

Is SpanSet Payload Controller free?
SpanSet Payload Controller is free to download, with no in-app purchases.
Is iVSP free?
iVSP is free to download, with no in-app purchases.
Do SpanSet Payload Controller or iVSP have ads?
Neither SpanSet Payload Controller nor iVSP shows ads.
Which is updated more often, SpanSet Payload Controller or iVSP?
SpanSet Payload Controller ships an update every 2 months, and iVSP every 21 months. Most recently, SpanSet Payload Controller was updated on May 17, 2026 and iVSP on September 11, 2026.

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