# Pump Go vs HydroCalc Basic

The clearest difference is update cadence: HydroCalc Basic at every 11 days against Pump Go's every 2 months. HydroCalc Basic also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Pump Go sells 2 in-app purchases, starting at $14.99 per year and HydroCalc Basic sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Pump Go ships an update every 2 months, HydroCalc Basic every 11 days. The most recent releases landed on September 9, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Pump Go | HydroCalc Basic |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 11 days** |
| Size | 23 MB | 35 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Irving Josue Cortes Iturriaga](https://appshunter.io/developer/1750836580) | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) |

## What reviewers say

### Pump Go

[App page](https://appshunter.io/ios/app/pump-go/id6745105179)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $14.99 | per year |
| Pump Go Forever | $59.99 | one-time |


### 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 Pump Go free?

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

### Is HydroCalc Basic free?

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

### Do Pump Go or HydroCalc Basic have ads?

Neither Pump Go nor HydroCalc Basic shows ads.

### Which is updated more often, Pump Go or HydroCalc Basic?

Pump Go ships an update every 2 months, and HydroCalc Basic every 11 days. Most recently, Pump Go was updated on September 9, 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.*