# JSlate vs HDRI Studio

The clearest difference is in-app purchases: JSlate at none against HDRI Studio's 3. JSlate also leads on update cadence (every 2 days vs weekly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. HDRI Studio sells 3 in-app purchases, starting at $19.99 per month. JSlate asks for nothing beyond the download.

JSlate ships an update every 2 days, HDRI Studio weekly. The most recent releases landed on October 25, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | JSlate | HDRI Studio |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Weekly |
| Size | 5 MB | 71 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [KEISUKE TONE](https://appshunter.io/developer/1893035978) | [Gianluca Gatto](https://appshunter.io/developer/6789729997) |

## What reviewers say

### JSlate

[App page](https://appshunter.io/ios/app/jslate-production-timer/id6762127732)

**Features:** macOS Compatibility

**In-app purchases:** none


### HDRI Studio

[App page](https://appshunter.io/ios/app/hdri-studio-360-hdr-camera/id6789729995)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $19.99 | per month |
| 4K Render Credit | $2.99 | one-time |
| 8K Render Credit | $7.99 | one-time |


## Frequently asked questions

### Is JSlate free?

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

### Is HDRI Studio free?

HDRI Studio is free to download, with in-app purchases available.

### Do JSlate or HDRI Studio have ads?

Neither JSlate nor HDRI Studio shows ads.

### Which is updated more often, JSlate or HDRI Studio?

JSlate ships an update every 2 days, and HDRI Studio weekly. Most recently, JSlate was updated on October 25, 2026 and HDRI Studio on October 22, 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.*