# Structure Sensor Calibrator vs 23HourDay

The clearest difference is in-app purchases: Structure Sensor Calibrator at none against 23HourDay's 2. 23HourDay's advantage is update cadence (fortnightly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 23HourDay sells 2 in-app purchases, starting at $12.95 per month. Structure Sensor Calibrator asks for nothing beyond the download.

Structure Sensor Calibrator ships an update every 2 months, 23HourDay fortnightly. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Structure Sensor Calibrator | 23HourDay |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/structure-sensor-calibrator/id914275485/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 19.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 39 MB | 71 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [XRPro, LLC](https://appshunter.io/developer/1642756687) | [Thomas Smith](https://appshunter.io/developer/1744157870) |

## What reviewers say

### Structure Sensor Calibrator

[App page](https://appshunter.io/ios/app/structure-sensor-calibrator/id914275485)

This utility app precisely aligns 3D depth data from a Structure Sensor accessory with your iOS device's camera. It enhances full-color 3D scanning and optimizes performance in related applications. The calibration process is quick and saves results directly to the accessory.

**Highlights:** Aligns 3D depth data, Enhances full-color 3D scanning, Optimizes sensor performance, Simple user interface, Quick calibration process, Saves results to accessory

**In-app purchases:** none


### 23HourDay

[App page](https://appshunter.io/ios/app/23hourday/id6501989004)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan - Monthly | $12.95 | per month |
| Premium Plan - Yearly | $149.00 | per year |


## Frequently asked questions

### Is Structure Sensor Calibrator free?

Structure Sensor Calibrator is free to download, with no in-app purchases.

### Is 23HourDay free?

23HourDay is free to download, with in-app purchases available.

### Do Structure Sensor Calibrator or 23HourDay have ads?

Neither Structure Sensor Calibrator nor 23HourDay shows ads.

### Which is updated more often, Structure Sensor Calibrator or 23HourDay?

Structure Sensor Calibrator ships an update every 2 months, and 23HourDay fortnightly. Most recently, Structure Sensor Calibrator was updated on October 13, 2026 and 23HourDay on October 6, 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.*