# HydroCalc Basic vs SprinkCalc

The clearest difference is iOS requirement: HydroCalc Basic at 15.1 against SprinkCalc's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. HydroCalc Basic sells 1 one-off in-app purchase and SprinkCalc sells 2 in-app purchases, starting at $9.99 per 7 days. Whichever you choose, the download price is not the number that matters.

HydroCalc Basic ships an update every 11 days, SprinkCalc every 2 weeks. The most recent releases landed on October 4, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | HydroCalc Basic | SprinkCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 2 weeks |
| Size | 35 MB | 17 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) | [Ahmet Selvi](https://appshunter.io/developer/1864624578) |

## What reviewers say

### 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 |


### SprinkCalc

[App page](https://appshunter.io/ios/app/sprinkcalc-fire-sprinkler/id6757990855)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $9.99 | per 7 days |
| Pro Yıllık | $39.99 | per year |


## Frequently asked questions

### Is HydroCalc Basic free?

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

### Is SprinkCalc free?

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

### Do HydroCalc Basic or SprinkCalc have ads?

Neither HydroCalc Basic nor SprinkCalc shows ads.

### Which is updated more often, HydroCalc Basic or SprinkCalc?

HydroCalc Basic ships an update every 11 days, and SprinkCalc every 2 weeks. Most recently, HydroCalc Basic was updated on October 4, 2026 and SprinkCalc on October 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.*