# LSPIV vs Vector Field

The clearest difference is rating: LSPIV at 5.0 against Vector Field's 4.5. LSPIV also leads on iOS requirement (11.0 vs 15.0). Vector Field's advantage is update cadence (every 3 months vs every 13 months) and ratings volume (6 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

LSPIV holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Vector Field has 6 ratings behind it against 1, so its average is the more settled of the two.

LSPIV ships an update every 13 months, Vector Field every 3 months. The most recent releases landed on October 5, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | LSPIV | Vector Field |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lspiv/id981387743/reviews)** | [4.5 (6 ratings)](https://appshunter.io/ios/app/vector-field-particle-flow/id1598282424/reviews) |
| Number of ratings | 1 | **6** |
| Positive reviews | — | 62.5% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 71 MB | 1 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Ryota Tsubaki](https://appshunter.io/developer/981387742) | [Eliott Morgensztern](https://appshunter.io/developer/1478504124) |

## 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


### Vector Field

[App page](https://appshunter.io/ios/app/vector-field-particle-flow/id1598282424)

Visualize mathematical vector fields with animated particles in 2D, 3D, or spherical spaces. Input custom equations and adjust simulation parameters in real-time to explore dynamical systems and mathematical patterns interactively.

**Highlights:** 2D, 3D, and spherical vector field visualization, Customizable dx, dy, dz equations, Adjustable particle speed, density, and colors, Time-dependent field animation, Interactive 3D view rotation, Real-time rendering powered by Metal

**In-app purchases:** none


## Frequently asked questions

### Is LSPIV free?

LSPIV is free to download, with no in-app purchases.

### Is Vector Field free?

Vector Field is free to download, with no in-app purchases.

### Which has better reviews, LSPIV or Vector Field?

LSPIV is rated higher. LSPIV averages 5.0 out of 5 from 1 ratings, while Vector Field averages 4.5 from 6 ratings.

### Do LSPIV or Vector Field have ads?

Neither LSPIV nor Vector Field shows ads.

### Which is updated more often, LSPIV or Vector Field?

LSPIV ships an update every 13 months, and Vector Field every 3 months. Most recently, LSPIV was updated on October 5, 2026 and Vector Field on October 10, 2026.

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