# Hydrology Formulator vs Desktop Journey

The clearest difference is update cadence: Desktop Journey at every 8 days against Hydrology Formulator's every 6 months. Desktop Journey also leads on iOS requirement (14.0 vs 18.6). Hydrology Formulator's advantage is monetization model (free vs freemium). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Hydrology Formulator sells 1 one-off in-app purchase and Desktop Journey sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Hydrology Formulator against 5.0 for Desktop Journey. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Hydrology Formulator ships an update every 6 months, Desktop Journey every 8 days. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Hydrology Formulator | Desktop Journey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/hydrology-formulator/id346512904/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/desktop-journey/id1530583648/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 8 days** |
| Monetization | **Free** | Freemium |
| Size | 18 MB | 5 MB |
| Requires iOS | 18.6 | **14.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Jonathan Schneider](https://appshunter.io/developer/911657253) |

## What reviewers say

### Hydrology Formulator

[App page](https://appshunter.io/ios/app/hydrology-formulator/id346512904)

This app provides a comprehensive collection of over 1,000 formulas, calculators, and conversions for hydrology and civil engineering. It covers a wide range of topics including groundwater, stormwater, pipe flow, and water pollution.

**Highlights:** 1,000+ formulas and calculators, Groundwater analysis tools, Stormwater design calculations, Open channel and pipe flow equations, Water pollution modeling, Conversions and reference data

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $3.99 | one-time |


### Desktop Journey

[App page](https://appshunter.io/ios/app/desktop-journey/id1530583648)

Transform your phone into a useful desk companion. It displays your calendar and reminders at a glance, and features a gamified element where you complete small tasks to defeat enemies during your workday. An optional subscription unlocks weather information.

**Highlights:** At-a-glance calendar and reminders, Time and date display, Gamified task completion, Customizable tasks, Optional weather display, Ad-free experience

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Unlock | $0.99 | per month |


## Frequently asked questions

### Is Hydrology Formulator free?

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

### Is Desktop Journey free?

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

### Which has better reviews, Hydrology Formulator or Desktop Journey?

Hydrology Formulator and Desktop Journey are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Hydrology Formulator or Desktop Journey have ads?

Neither Hydrology Formulator nor Desktop Journey shows ads.

### Which is updated more often, Hydrology Formulator or Desktop Journey?

Hydrology Formulator ships an update every 6 months, and Desktop Journey every 8 days. Most recently, Hydrology Formulator was updated on November 1, 2026 and Desktop Journey on November 3, 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.*