# IHehsCalc vs IHNotes

IHehsCalc and IHNotes are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

IHehsCalc ships an update every 6 weeks, IHNotes every 3 weeks. The most recent releases landed on September 29, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | IHehsCalc | IHNotes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/ihehscalc/id6446093566/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 68 MB | 66 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [A-EHS](https://appshunter.io/developer/1114522351) | [Applied Particle Technology Inc.](https://appshunter.io/developer/1764516372) |

## What reviewers say

### IHehsCalc

[App page](https://appshunter.io/ios/app/ihehscalc/id6446093566)

This application provides essential calculations for professionals in the environment, health, and safety (EHS) field. It serves as a modern homage to a popular original app, offering useful tools for industrial hygiene tasks. The app is free to use, with an option to donate to a relevant foundation.

**Highlights:** EHS calculations, Industrial hygiene formulas, Homage to original IHcalc app, Free to use, Donation option

**Features:** macOS Compatibility

**In-app purchases:** none


### IHNotes

[App page](https://appshunter.io/ios/app/ihnotes/id6749886297)

**In-app purchases:** none


## Frequently asked questions

### Is IHehsCalc free?

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

### Is IHNotes free?

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

### Do IHehsCalc or IHNotes have ads?

Neither IHehsCalc nor IHNotes shows ads.

### Which is updated more often, IHehsCalc or IHNotes?

IHehsCalc ships an update every 6 weeks, and IHNotes every 3 weeks. Most recently, IHehsCalc was updated on September 29, 2026 and IHNotes on September 18, 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.*