# 一卷 Rollbook vs EMULSION

The clearest difference is price: 一卷 Rollbook at Free against EMULSION's $2.99. EMULSION's advantage is in-app purchases (none vs 1) and update cadence (every 3 days vs every 3 weeks). On ads and iOS requirement there is nothing between them.

一卷 Rollbook is free to download; EMULSION costs $2.99 up front. 一卷 Rollbook sells 1 one-off in-app purchase. EMULSION asks for nothing beyond the download.

一卷 Rollbook ships an update every 3 weeks, EMULSION every 3 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 一卷 Rollbook | EMULSION |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | — | Paid |
| Size | 22 MB | 49 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | iPhone | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [昌俊 刘](https://appshunter.io/developer/6786316789) | [子轩 曾](https://appshunter.io/developer/6819950593) |

## What reviewers say

### 一卷 Rollbook

[App page](https://appshunter.io/ios/app/rollbook/id6786322386)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rollbook Pro Lifetime | $9.99 | one-time |


### EMULSION

[App page](https://appshunter.io/ios/app/emulsion/id6819966294)

This app simulates the film photography process, allowing users to choose cameras, film types, and develop photos. It offers features like different aspect ratios, manual control over development, and the ability to reframe existing photos. Users can organize their work into rolls and enjoy offline music and Apple Watch remote shutter functionality.

**Highlights:** Select cameras and film types, Choose aspect ratios (135, 120, 110, SUPER 8), Manual and automatic photo development, Reframing and editing imported photos, Organize photos by film rolls, Offline music library and Apple Watch remote shutter

**Features:** macOS Compatibility, Apple Watch app, iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is 一卷 Rollbook free?

一卷 Rollbook is free to download, with in-app purchases available.

### Is EMULSION free?

EMULSION costs $2.99, with no in-app purchases.

### Do 一卷 Rollbook or EMULSION have ads?

Neither 一卷 Rollbook nor EMULSION shows ads.

### Which is updated more often, 一卷 Rollbook or EMULSION?

一卷 Rollbook ships an update every 3 weeks, and EMULSION every 3 days. Most recently, 一卷 Rollbook was updated on October 24, 2026 and EMULSION on October 31, 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.*