# my.wodtke vs HydroCalc Basic

The clearest difference is in-app purchases: my.wodtke at none against HydroCalc Basic's 1. my.wodtke also leads on iOS requirement (12.0 vs 15.1). HydroCalc Basic's advantage is update cadence (every 11 days vs every 7 months). On price, ads and device support there is nothing between them.

Both are free to download. HydroCalc Basic sells 1 one-off in-app purchase. my.wodtke asks for nothing beyond the download.

my.wodtke ships an update every 7 months, HydroCalc Basic every 11 days. The most recent releases landed on September 14, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | my.wodtke | HydroCalc Basic |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 11 days** |
| Size | 21 MB | 35 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wodtke GmbH](https://appshunter.io/developer/887778580) | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) |

## What reviewers say

### my.wodtke

[App page](https://appshunter.io/ios/app/mywodtke/id1488459250)

**Features:** macOS Compatibility

**In-app purchases:** none


### HydroCalc Basic

[App page](https://appshunter.io/ios/app/hydrocalc-basic/id6752577110)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Flow Units & Ad-Free | $1.99 | one-time |


## Frequently asked questions

### Is my.wodtke free?

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

### Is HydroCalc Basic free?

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

### Do my.wodtke or HydroCalc Basic have ads?

Neither my.wodtke nor HydroCalc Basic shows ads.

### Which is updated more often, my.wodtke or HydroCalc Basic?

my.wodtke ships an update every 7 months, and HydroCalc Basic every 11 days. Most recently, my.wodtke was updated on September 14, 2026 and HydroCalc Basic on September 8, 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.*