# Thetis Tools vs Pump Calculator

The clearest difference is price: Thetis Tools at Free against Pump Calculator's $2.99. Thetis Tools also leads on update cadence (every 7 months vs every 41 months) and iOS requirement (14.0 vs 16.1). On ads, in-app purchases and device support there is nothing between them.

Thetis Tools is free to download; Pump Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Thetis Tools ships an update every 7 months, Pump Calculator every 41 months. The most recent releases landed on September 10, 2026 and August 24, 2026 respectively.

## The numbers

| Metric | Thetis Tools | Pump Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/pump-calculator/id1487084383/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 41 months |
| Monetization | — | Paid |
| Size | 50 MB | 1 MB |
| Requires iOS | **14.0** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thetis srl](https://appshunter.io/developer/397584184) | [Imran Pinjara](https://appshunter.io/developer/1484488781) |

## What reviewers say

### Thetis Tools

[App page](https://appshunter.io/ios/app/thetis-tools/id1460268980)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pump Calculator

[App page](https://appshunter.io/ios/app/pump-calculator/id1487084383)

Calculate pump power requirements quickly and easily. This utility app features calculators for pump power, flow rate, and head, based on centrifugal pump principles. It's designed for engineers needing to determine hydraulic, shaft, and motor power.

**Highlights:** Pump Power Calculator, Pump Flow Rate Calculator, Pump Head Calculator, Hydraulic Power Calculation, Shaft Power Calculation, Motor Power Calculation

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

**In-app purchases:** none


## Frequently asked questions

### Is Thetis Tools free?

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

### Is Pump Calculator free?

Pump Calculator costs $2.99, with no in-app purchases.

### Do Thetis Tools or Pump Calculator have ads?

Neither Thetis Tools nor Pump Calculator shows ads.

### Which is updated more often, Thetis Tools or Pump Calculator?

Thetis Tools ships an update every 7 months, and Pump Calculator every 41 months. Most recently, Thetis Tools was updated on September 10, 2026 and Pump Calculator on August 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*