# H&I Products — RF Calculator & Visualizer

> RF Calculator & Visualizer (iPhone/iPad app by HyeBeen Han.)

- Source: https://appshunter.io/ios/app/h-and-i-products/id6758018335 (this page in markdown: same URL + `.md`)
- Developer: [HyeBeen Han](https://appshunter.io/developer/1846173499)
- Category: Utilities, Reference
- Price: Free
- Age rating: 4+
- Requires: iOS 17.6 · 9 MB
- Languages: English
- Released: 2026-01-20
- Data updated: 2026-07-09
- User reviews in markdown: https://appshunter.io/ios/app/h-and-i-products/id6758018335/reviews.md

## What is H&I Products?

HIProducts is a practical tool for RF/communication engineers and radio/frequency analysis users.
By entering F1 and F2 (FM Band) values, it automatically calculates harmonics and intermodulation products and visualizes them in a graph.
Graphs can be saved as images or shared with other apps via the iOS Share Sheet.

How to Use
1. Enter F1 and F2 (FM Band) values.
2. Tap the "Generate" button to create a graph.
3. Pinch with two fingers to zoom in/out on the graph.
(Zoom is also possible using the + / - buttons)
4. Use the Share button to save or share as an image/PDF.


## Version history (last 4 releases)

### 1.3 — 2026-07-01

UI/UX changes for future features

### 1.2 — 2026-02-04

- Improved graph visualization
- Added zoom buttons
- Adjusted share button placement

### 1.1 — 2026-02-03

- Added pinch zoom feature to zoom in and out with two fingers
- Screen adjustments for portrait/landscape orientation
- Graph display improvements
- Share sheet bug fixes
- System mode support

### 1.0 — 2026-01-21

No release notes.

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## More apps by HyeBeen Han

- [키뫂](https://appshunter.io/ios/app/id6761304301)
- [Hear With Eyes](https://appshunter.io/ios/app/hear-with-eyes/id6786356764)

All apps by HyeBeen Han: https://appshunter.io/developer/1846173499

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-09.*