# i41CX+ vs Jetstream Waterblast Tools

The clearest difference is price: Jetstream Waterblast Tools at Free against i41CX+'s $24.99. i41CX+'s advantage is update cadence (every 5 weeks vs every 3 months) and iOS requirement (13.0 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Jetstream Waterblast Tools is free to download; i41CX+ costs $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

i41CX+ ships an update every 5 weeks, Jetstream Waterblast Tools every 3 months. The most recent releases landed on September 25, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | i41CX+ | Jetstream Waterblast Tools |
| --- | --- | --- |
| Price | $24.99 | **Free** |
| Rating | **[4.8 (106 ratings)](https://appshunter.io/ios/app/i41cx-plus/id289068865/reviews)** | — |
| Number of ratings | **106** | — |
| Positive reviews | 91.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Paid | — |
| Size | 123 MB | 50 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Antonio Lagana](https://appshunter.io/developer/289068868) | [Jetstream of Houston, INC.](https://appshunter.io/developer/1807834230) |

## What reviewers say

### i41CX+

[App page](https://appshunter.io/ios/app/i41cx-plus/id289068865)

This advanced RPN scientific calculator offers workstation-class Computer Algebra System (CAS) capabilities, going beyond traditional replicas. It provides access to an extensive library of modules and programs, enhanced with iOS features, customizable skins, and iCloud support for seamless data management.

**Highlights:** RPN logic with 4-element stack, Extensive memory registers, Over 400 built-in functions, Computer Algebra System (CAS), Virtual thermal printer/plotter, Access to HP-41 module library, Customizable skins and keyboard overlays

**In-app purchases:** none

**What reviewers like**

- 🚀 Fantastic emulation of the original HP41 calculator
- 🔒 Faithful to the original hardware and functionality
- 👍 Includes all the expansion modules and accessories
- 👍 Responsive and never crashes
- 👍 Excellent implementation of RPN and programmability

**What reviewers complain about**

- 🔋 Can drain battery when left on
- 👎 Small button size can lead to mis-taps
- 👎 Slow startup time in some versions

**Reported bugs**

- Issues with the 41Z math module producing garbled output
- Scaling problems with overlays

**Requested features**

- Landscape mode for better button size
- Haptic feedback for button presses
- Ability to load and save programs/modules via cloud/email
- Macros or scripting support


### Jetstream Waterblast Tools

[App page](https://appshunter.io/ios/app/jetstream-waterblast-tools/id6744464483)

**In-app purchases:** none


## Frequently asked questions

### Is i41CX+ free?

i41CX+ costs $24.99, with no in-app purchases.

### Is Jetstream Waterblast Tools free?

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

### Do i41CX+ or Jetstream Waterblast Tools have ads?

Neither i41CX+ nor Jetstream Waterblast Tools shows ads.

### Which is updated more often, i41CX+ or Jetstream Waterblast Tools?

i41CX+ ships an update every 5 weeks, and Jetstream Waterblast Tools every 3 months. Most recently, i41CX+ was updated on September 25, 2026 and Jetstream Waterblast Tools on September 10, 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.*