# JPEG XL Toolbox vs Celvion Stack

The clearest difference is price: JPEG XL Toolbox at Free against Celvion Stack's $9.90. Celvion Stack's advantage is in-app purchases (none vs 1). On update cadence, ads, device support and iOS requirement there is nothing between them.

JPEG XL Toolbox is free to download; Celvion Stack costs $9.90 up front. JPEG XL Toolbox sells 1 one-off in-app purchase. Celvion Stack asks for nothing beyond the download.

JPEG XL Toolbox ships an update monthly, Celvion Stack every 2 weeks. The most recent releases landed on October 12, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | JPEG XL Toolbox | Celvion Stack |
| --- | --- | --- |
| Price | **Free** | $9.90 |
| Rating | **[4.8 (4 ratings)](https://appshunter.io/ios/app/jpeg-xl-toolbox/id6470681357/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 5 MB | 324 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SUIKA LTD](https://appshunter.io/developer/1597116502) | [新庾 郭](https://appshunter.io/developer/6786308122) |

## What reviewers say

### JPEG XL Toolbox

[App page](https://appshunter.io/ios/app/jpeg-xl-toolbox/id6470681357)

This app converts various image formats, including ProRAW DNG, HEIF, and JPEG, to JPEG XL (JXL). It offers lossless and lossy compression options, preserves metadata and 16-bit depth, and supports batch conversions. The app also maintains HDR display effects.

**Highlights:** ProRAW DNG to JXL conversion, Lossless and lossy compression, Metadata and 16-bit depth preservation, HDR display effect support, Batch conversion, HEIF and JPEG to JXL conversion

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| JPEG XL Toolbox Pro | $4.99 | one-time |


### Celvion Stack

[App page](https://appshunter.io/ios/app/celvion-stack/id6790672094)

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

**In-app purchases:** none


## Frequently asked questions

### Is JPEG XL Toolbox free?

JPEG XL Toolbox is free to download, with in-app purchases available.

### Is Celvion Stack free?

Celvion Stack costs $9.90, with no in-app purchases.

### Do JPEG XL Toolbox or Celvion Stack have ads?

Neither JPEG XL Toolbox nor Celvion Stack shows ads.

### Which is updated more often, JPEG XL Toolbox or Celvion Stack?

JPEG XL Toolbox ships an update monthly, and Celvion Stack every 2 weeks. Most recently, JPEG XL Toolbox was updated on October 12, 2026 and Celvion Stack 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.*