# Fluid Simulation vs Duo Wallpaper

Fluid Simulation and Duo Wallpaper are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Fluid Simulation sells 5 in-app purchases, starting at $1.99 per 7 days and Duo Wallpaper sells 7 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on November 11, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Fluid Simulation | Duo Wallpaper |
| --- | --- | --- |
| Price | Free | 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 | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 days | Every 3 days |
| Size | 13 MB | 32 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Appnics, LLC](https://appshunter.io/developer/1452151367) | [wei xiang](https://appshunter.io/developer/1125802756) |

## What reviewers say

### 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 |


### Duo Wallpaper

[App page](https://appshunter.io/ios/app/duo-wallpaper-foldable-phone/id6816573258)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $4.99 | per month |
| 年度会员 | $29.99 | per year |
| 100 Credits | $2.99 | one-time |
| 260 Credits | $4.99 | one-time |
| 400 Credits | $6.99 | one-time |
| 700 Credits | $9.99 | one-time |
| Lifetime Pro | $59.99 | one-time |


## Frequently asked questions

### Is Fluid Simulation free?

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

### Is Duo Wallpaper free?

Duo Wallpaper is free to download, with in-app purchases available.

### Do Fluid Simulation or Duo Wallpaper have ads?

Both Fluid Simulation and Duo Wallpaper show ads.

### Which is updated more often, Fluid Simulation or Duo Wallpaper?

Fluid Simulation ships an update every 3 days, and Duo Wallpaper every 3 days. Most recently, Fluid Simulation was updated on November 11, 2026 and Duo Wallpaper on November 10, 2026.

---

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