Comparison

LSPIV vs Led Programmer

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

Head to head
About

LSPIV

This application enables large-scale particle image velocimetry (LSPIV) using a smartphone. It offers a non-intrusive method for measuring water surface velocity distribution in both field and lab settings. The app provides instant ortho-rectification of captured images without needing ground control points.

Highlights
  • Large-scale particle image velocimetry
  • Water surface velocity measurement
  • Non-intrusive velocimetry
  • Smartphone implementation
  • Instant ortho-rectification
  • No GCPs required
Features
Read full description

LSPIV (large-scale particle image velocimetry) is an image-based method for measuring velocity distribution on the water surface. Applications of LSPIV have been increasing for both field and laboratory experiments as unique and powerful tools for non-intrusive velocimetry using conventional imaging devices and specialized image processing software. This app utilizes a smartphone to implement LSPIV. By innovatively combining the sensors embedded in smartphones, the images captured with them can be intrinsically and instantly ortho-rectified without making recourse to GCPs. The app was developed under support by the River Fund in charge of the Foundation of River and Watershed Environment Management (FOREM), Japan; Grant-in-Aid for Young Scientists (B); and the Research Fund of Japan Institute of Country-ology and Engineering.

About

Led Programmer

This app teaches children basic computer programming concepts and how LED screens function. It offers a puzzle mode to develop coordinate skills and numerical reasoning through interactive challenges.

Highlights
  • Basic computer programming concepts
  • LED screen functionality
  • Screen coordinates
  • File creation, saving, and deletion
  • Puzzle mode with 20 levels
  • Coordinate skill development
  • Use of numbers, colors, letters, and math
Features
Read full description

With Programming Led Screen app kids can now understand and learn basic concepts about; Basic computer programming, How led screens works, Screen Coordinates, Creating, saving deleting files Programming a Led Screen With i, Programmer : Led Screen puzzle mode kids can solve 20 Level of basic puzzles and will develop; Coordinate skill, Using numbers, colours, letters and math all together it's a full functional led screen programming tool that can give idea about what it means to be a programmer. We encourage parades to participate and play with their children.

Screenshots

LSPIV1 screens
Led Programmer4 screens

Verdict

The call

The clearest difference is price: LSPIV at Free against Led Programmer's $0.99. Led Programmer's advantage is update cadence (every 3 weeks vs every 13 months) and iOS requirement (8.0 vs 11.0). On rating, ratings volume, ads and in-app purchases 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

LSPIV is free to download; Led Programmer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for LSPIV against 5.0 for Led Programmer. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

LSPIV ships an update every 13 months, Led Programmer every 3 weeks. The most recent releases landed on June 24, 2026 and September 19, 2026 respectively.

Scorecard4 real differences · 5 level
LSPIV versus Led Programmer: the parameters behind the verdict, then further details
ParameterLSPIVLed Programmer
PriceFree — better$0.99
Rating5.0 (1 ratings)5.0 (2 ratings)
Number of ratings12 — better
Update frequencyEvery 13 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.08.0 — better
Further details — not scored
Size71 MB31 MB
Age rating4+4+
DeveloperRyota TsubakiErkan SIRIN

Customer experience

LSPIV

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Led Programmer

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

LSPIV

No in-app purchases

None

Led Programmer

No in-app purchases

Questions

Is LSPIV free?
LSPIV is free to download, with no in-app purchases.
Is Led Programmer free?
Led Programmer costs $0.99, with no in-app purchases.
Which has better reviews, LSPIV or Led Programmer?
LSPIV and Led Programmer are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do LSPIV or Led Programmer have ads?
Neither LSPIV nor Led Programmer shows ads.
Which is updated more often, LSPIV or Led Programmer?
LSPIV ships an update every 13 months, and Led Programmer every 3 weeks. Most recently, LSPIV was updated on June 24, 2026 and Led Programmer on September 19, 2026.

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