# PhotoCal mobile vs DuetShot

The clearest difference is in-app purchases: PhotoCal mobile at none against DuetShot's 1. DuetShot's advantage is iOS requirement (15.1 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DuetShot sells 1 one-off in-app purchase. PhotoCal mobile asks for nothing beyond the download.

PhotoCal mobile ships an update every 3 days, DuetShot every 4 days. The most recent releases landed on October 12, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | PhotoCal mobile | DuetShot |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 days |
| Size | 5 MB | 78 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Frank Weigand](https://appshunter.io/developer/1877895544) | [HAOTIAN WU](https://appshunter.io/developer/1859857372) |

## What reviewers say

### PhotoCal mobile

[App page](https://appshunter.io/ios/app/photocal-mobile/id6759879115)

**In-app purchases:** none


### DuetShot

[App page](https://appshunter.io/ios/app/duetshot-split-screen-camera/id6763319160)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dual Cam Pro | $4.99 | one-time |


## Frequently asked questions

### Is PhotoCal mobile free?

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

### Is DuetShot free?

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

### Do PhotoCal mobile or DuetShot have ads?

Neither PhotoCal mobile nor DuetShot shows ads.

### Which is updated more often, PhotoCal mobile or DuetShot?

PhotoCal mobile ships an update every 3 days, and DuetShot every 4 days. Most recently, PhotoCal mobile was updated on October 12, 2026 and DuetShot on October 20, 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.*