# Voice Note vs HiPER Scientific Calculator

The clearest difference is price: HiPER Scientific Calculator at Free against Voice Note's $2.99. HiPER Scientific Calculator also leads on iOS requirement (15.0 vs 17.0). Voice Note's advantage is ads (none vs shown) and review sentiment (100% vs 83%). On update cadence, in-app purchases and device support there is nothing between them.

HiPER Scientific Calculator is free to download; Voice Note costs $2.99 up front. Voice Note sells 3 in-app purchases, starting at $1.99 per month and HiPER Scientific Calculator sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Voice Note ships an update every 2 weeks, HiPER Scientific Calculator every 3 weeks. Both last shipped on November 7, 2026.

## The numbers

| Metric | Voice Note | HiPER Scientific Calculator |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[4.7 (279 ratings)](https://appshunter.io/ios/app/hiper-scientific-calculator/id1645513530/reviews)** |
| Number of ratings | — | **279** |
| Positive reviews | **100.0% of reviews** | 82.8% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 41 MB | 35 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Harun Karahan](https://appshunter.io/developer/1889305206) | [Jindrich Houska](https://appshunter.io/developer/1645513532) |

## What reviewers say

### Voice Note

[App page](https://appshunter.io/ios/app/voice-note-sticky-notes/id1516545852)

Easily design and create custom stickers, labels, and planner sheets with professional results. Choose from templates, customize elements like colors and text, and export high-quality, print-ready PDF files directly from your iPhone.

**Highlights:** Design custom stickers, Use ready-made templates, Customize colors and text, Export print-ready PDFs, Create planner stickers and labels, Design sticker sheets in any size

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sticky Notes Pro Monthly | $1.99 | per month |
| Sticky Notes Pro Yearly | $12.99 | per year |
| Lifetime Pro | $17.99 | one-time |


### HiPER Scientific Calculator

[App page](https://appshunter.io/ios/app/hiper-scientific-calculator/id1645513530)

This app offers advanced scientific calculation capabilities, including symbolic algebra, equation solving, and calculus functions. It supports high precision, natural expression input, and various display formats. Users can also visualize functions and equations with 2D and 3D graphing.

**Highlights:** Symbolic algebra, Integrals and derivatives, High precision calculations, Natural expression input, 2D and 3D graphing, Matrices and vectors, Unit conversions

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro version | $0.99 | per month |
| Pro Forever | $7.99 | one-time |

**What reviewers like**

- 👍 Excellent functionality for technical users
- 💡 Custom functions for non-trivial calculations
- 👍 Great expression screen, easy to navigate
- 👍 Accurate and intuitive UI
- 👍 Remains the best after years of use

**What reviewers complain about**

- 🐛 Keyboard unresponsive at times
- 🐛 Ads in paid version
- 🐛 iOS version lacks RPN mode
- 🐛 iOS version lacks themes
- 🐛 iOS version lacks custom functions

**Reported bugs**

- Keyboard unresponsive in multiple occasions
- App freezes when entering numbers
- Failed upgrade workflow message
- App offers paid upgrade after purchase
- White text unreadable on dark background in iOS settings

**Requested features**

- Allow custom infix operations
- Add widget support
- Add RPN mode to iOS version
- Add themes to iOS version
- Add custom functions to iOS version


## Frequently asked questions

### Is Voice Note free?

Voice Note costs $2.99, and also offers in-app purchases.

### Is HiPER Scientific Calculator free?

HiPER Scientific Calculator is free to download, with in-app purchases available.

### Do Voice Note or HiPER Scientific Calculator have ads?

HiPER Scientific Calculator shows ads; Voice Note does not.

### Which is updated more often, Voice Note or HiPER Scientific Calculator?

Voice Note ships an update every 2 weeks, and HiPER Scientific Calculator every 3 weeks. Most recently, Voice Note was updated on November 7, 2026 and HiPER Scientific Calculator on November 7, 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.*