# LSPIV vs Led Programmer

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.

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.

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.

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.

## The numbers

| Metric | LSPIV | Led Programmer |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/lspiv/id981387743/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/led-programmer/id1243236620/reviews) |
| Number of ratings | 1 | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Monetization | **Free** | Paid |
| Size | 71 MB | 31 MB |
| Requires iOS | 11.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ryota Tsubaki](https://appshunter.io/developer/981387742) | [Erkan SIRIN](https://appshunter.io/developer/617648754) |

## What reviewers say

### LSPIV

[App page](https://appshunter.io/ios/app/lspiv/id981387743)

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:** macOS Compatibility

**In-app purchases:** none


### Led Programmer

[App page](https://appshunter.io/ios/app/led-programmer/id1243236620)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*