# Gradiance vs Fluid Simulation

The clearest difference is price: Fluid Simulation at Free against Gradiance's $1.99. Fluid Simulation also leads on update cadence (every 3 days vs every 4 months). Gradiance's advantage is in-app purchases (none vs 5) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Fluid Simulation is free to download; Gradiance costs $1.99 up front. Fluid Simulation sells 5 in-app purchases, starting at $1.99 per 7 days. Gradiance asks for nothing beyond the download.

Gradiance ships an update every 4 months, Fluid Simulation every 3 days. The most recent releases landed on November 8, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | Gradiance | Fluid Simulation |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/fluid-simulation-liquidtouch/id6809601256/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 3 days** |
| Size | 10 MB | 13 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [YENCO.COM](https://appshunter.io/developer/480982815) | [Appnics, LLC](https://appshunter.io/developer/1452151367) |

## What reviewers say

### Gradiance

[App page](https://appshunter.io/ios/app/gradiance/id6741652166)

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases:** none


### Fluid Simulation

[App page](https://appshunter.io/ios/app/fluid-simulation-liquidtouch/id6809601256)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LIQUIDTOUCH Weekly | $1.99 | per 7 days |
| LIQUIDTOUCH Monthly | $1.99 | per month |
| LIQUIDTOUCH Yearly | $14.99 | per year |
| LIQUIDTOUCH Lifetime | $19.99 | one-time |
| LIQUIDTOUCH Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Gradiance free?

Gradiance costs $1.99, with no in-app purchases.

### Is Fluid Simulation free?

Fluid Simulation is free to download, with in-app purchases available.

### Do Gradiance or Fluid Simulation have ads?

Fluid Simulation shows ads; Gradiance does not.

### Which is updated more often, Gradiance or Fluid Simulation?

Gradiance ships an update every 4 months, and Fluid Simulation every 3 days. Most recently, Gradiance was updated on November 8, 2026 and Fluid Simulation on November 11, 2026.

---

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