# Schmidt Rebound Hammer vs Propeller Mobile

The clearest difference is review sentiment: Schmidt Rebound Hammer at 100% against Propeller Mobile's 40%. Schmidt Rebound Hammer also leads on rating (5.0 vs 4.2). Propeller Mobile's advantage is update cadence (every 2 weeks vs every 2 months) and monetization model (free vs ad-supported). On price, ads, 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.

Schmidt Rebound Hammer holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Propeller Mobile has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Schmidt Rebound Hammer's written reviews are positive against 40% of Propeller Mobile's.

Schmidt Rebound Hammer ships an update every 2 months, Propeller Mobile every 2 weeks. The most recent releases landed on August 22, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Schmidt Rebound Hammer | Propeller Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/schmidt-rebound-hammer/id1239435876/reviews)** | [4.2 (10 ratings)](https://appshunter.io/ios/app/propeller-mobile-3d-mapping/id1644272004/reviews) |
| Number of ratings | 2 | **10** |
| Positive reviews | **100.0% of reviews** | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 377 MB | 214 MB |
| Requires iOS | **15.0** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Screening Eagle Technologies](https://appshunter.io/developer/1515215362) | [Propeller Aerobotics Pty Ltd](https://appshunter.io/developer/1077083929) |

## What reviewers say

### Schmidt Rebound Hammer

[App page](https://appshunter.io/ios/app/schmidt-rebound-hammer/id1239435876)

This app enhances the functionality of Schmidt rebound hammers for concrete and rock testing. It automates calculations, allows custom curves, tracks verification, and generates PDF reports. Collaborate and share data easily through cloud synchronization.

**Highlights:** Automated rebound number calculation, Custom curve support, Verification tracking, Logbook for reporting, PDF report generation, Cloud-based sharing and synchronization

**In-app purchases:** none


### Propeller Mobile

[App page](https://appshunter.io/ios/app/propeller-mobile-3d-mapping/id1644272004)

This app provides field crews with a mobile 3D site inspection tool. It enables real-time navigation, site checks, and data capture to facilitate faster decision-making and keep projects on track.

**Highlights:** Live navigation, 3D site mapping, Media documentation, Grade checking, Cut-fill analysis, Surface area measurement, Stockpile volumes

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

**In-app purchases:** none


## Frequently asked questions

### Is Schmidt Rebound Hammer free?

Schmidt Rebound Hammer is free to download, with no in-app purchases.

### Is Propeller Mobile free?

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

### Which has better reviews, Schmidt Rebound Hammer or Propeller Mobile?

Schmidt Rebound Hammer is rated higher. Schmidt Rebound Hammer averages 5.0 out of 5 from 2 ratings, while Propeller Mobile averages 4.2 from 10 ratings.

### Do Schmidt Rebound Hammer or Propeller Mobile have ads?

Neither Schmidt Rebound Hammer nor Propeller Mobile shows ads.

### Which is updated more often, Schmidt Rebound Hammer or Propeller Mobile?

Schmidt Rebound Hammer ships an update every 2 months, and Propeller Mobile every 2 weeks. Most recently, Schmidt Rebound Hammer was updated on August 22, 2026 and Propeller Mobile on September 13, 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.*