# DBHam vs CalcStak

The clearest difference is in-app purchases: DBHam at none against CalcStak's 1. DBHam also leads on iOS requirement (10.3 vs 17.0). CalcStak's advantage is update cadence (every 5 months vs every 29 months). On price, ads and device support there is nothing between them.

Both are free to download. CalcStak sells 1 one-off in-app purchase. DBHam asks for nothing beyond the download.

DBHam ships an update every 29 months, CalcStak every 5 months. The most recent releases landed on November 6, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | DBHam | CalcStak |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (3 ratings)](https://appshunter.io/ios/app/dbham/id558673465/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 5 months** |
| Monetization | Free | — |
| Size | 12 MB | 1 MB |
| Requires iOS | **10.3** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Sullivan](https://appshunter.io/developer/307748713) | [JOEL ANDREW ROSINBUM](https://appshunter.io/developer/1896305700) |

## What reviewers say

### DBHam

[App page](https://appshunter.io/ios/app/dbham/id558673465)

Calculate the distance and bearing between two locations using the Maidenhead grid system. Originally designed for amateur radio operators, it helps determine proximity and direction to other radio enthusiasts.

**Highlights:** Calculate distance, Calculate bearing, Maidenhead grid system, Amateur radio focused, Location annotation

**Features:** macOS Compatibility

**In-app purchases:** none


### CalcStak

[App page](https://appshunter.io/ios/app/calcstak/id6766592809)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scientific Functions | $2.99 | one-time |


## Frequently asked questions

### Is DBHam free?

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

### Is CalcStak free?

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

### Do DBHam or CalcStak have ads?

Neither DBHam nor CalcStak shows ads.

### Which is updated more often, DBHam or CalcStak?

DBHam ships an update every 29 months, and CalcStak every 5 months. Most recently, DBHam was updated on November 6, 2026 and CalcStak on November 9, 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.*