# ReefScan vs Hourglass

The clearest difference is ads: ReefScan at none against Hourglass's shown. ReefScan also leads on iOS requirement (14.0 vs 16.0). Hourglass's advantage is update cadence (every 4 days vs every 23 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReefScan ships an update every 23 months, Hourglass every 4 days. The most recent releases landed on October 3, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | ReefScan | Hourglass |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/reefscan/id6444350547/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 23 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 14 MB | 33 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CraniaLab, LLC](https://appshunter.io/developer/1495242488) | [kenji abe](https://appshunter.io/developer/1461779902) |

## What reviewers say

### ReefScan

[App page](https://appshunter.io/ios/app/reefscan/id6444350547)

Capture underwater images and depth data to create 3D models with a companion desktop application. This tool is fast, accurate, and versatile, working both above and below water.

**Highlights:** Underwater image and depth map collection, 3D model creation with MacOS companion app, Fast and accurate scanning, Above-water scanning capability, Compatibility with other photogrammetry apps

**Features:** macOS Compatibility

**In-app purchases:** none


### Hourglass

[App page](https://appshunter.io/ios/app/hourglass-physics-simulation/id6670490622)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ReefScan free?

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

### Is Hourglass free?

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

### Do ReefScan or Hourglass have ads?

Hourglass shows ads; ReefScan does not.

### Which is updated more often, ReefScan or Hourglass?

ReefScan ships an update every 23 months, and Hourglass every 4 days. Most recently, ReefScan was updated on October 3, 2026 and Hourglass on September 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*