# NCMD vs HydraCal

The clearest difference is update cadence: HydraCal at every 4 weeks against NCMD's every 2 months. NCMD's advantage is iOS requirement (13.4 vs 15.1). 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.

NCMD ships an update every 2 months, HydraCal every 4 weeks. The most recent releases landed on October 14, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | NCMD | HydraCal |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 21 MB | 39 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [BRAVE BEAR MARKETING LIMITED](https://appshunter.io/developer/1617638599) | [Daniel Mitchell](https://appshunter.io/developer/1837385073) |

## What reviewers say

### NCMD

[App page](https://appshunter.io/ios/app/ncmd/id1617638597)

Access your membership account, stay updated with the latest news, and engage in community forums. Document your discoveries by photographing them and recording their precise location.

**Highlights:** Membership account access, Latest news updates, Community forum, Competitions, Find documentation (photo & location), Legislation updates

**In-app purchases:** none


### HydraCal

[App page](https://appshunter.io/ios/app/hydracal/id6751882234)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NCMD free?

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

### Is HydraCal free?

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

### Do NCMD or HydraCal have ads?

Neither NCMD nor HydraCal shows ads.

### Which is updated more often, NCMD or HydraCal?

NCMD ships an update every 2 months, and HydraCal every 4 weeks. Most recently, NCMD was updated on October 14, 2026 and HydraCal on October 28, 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.*