# StemFox Scientific Calculator vs CONFORM ™ eDiary

The clearest difference is in-app purchases: CONFORM ™ eDiary at none against StemFox Scientific Calculator's 6. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. StemFox Scientific Calculator sells 6 in-app purchases, starting at $2.99 per month. CONFORM ™ eDiary asks for nothing beyond the download.

StemFox Scientific Calculator ships an update every 3 months, CONFORM ™ eDiary every 2 months. The most recent releases landed on October 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | StemFox Scientific Calculator | CONFORM ™ eDiary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (11 ratings)](https://appshunter.io/ios/app/stemfox-scientific-calculator/id1411592118/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Freemium | — |
| Size | 24 MB | 38 MB |
| Requires iOS | **15** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Joshua Bryson](https://appshunter.io/developer/1367675392) | [EDETEK Inc](https://appshunter.io/developer/1825752776) |

## What reviewers say

### StemFox Scientific Calculator

[App page](https://appshunter.io/ios/app/stemfox-scientific-calculator/id1411592118)

Streamline complex STEM calculations with a powerful calculator, textbook equation solver, and comprehensive unit converter. Designed for engineers, it reduces busywork and improves accuracy for homework and technical tasks.

**Highlights:** Advanced scientific calculator with 80+ functions, Textbook equation solver for any variable, Searchable equation database by chapter, Fast table lookup with linear interpolation, Comprehensive unit converter with 300+ conversions, Copy and paste functionality for values and equations

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly - Unlimited | $2.99 | per month |
| Yearly - Unlimited | $9.99 | per year |
| Donut | $0.99 | one-time |
| Drink | $2.99 | one-time |
| Taco | $4.99 | one-time |
| Pizza | $9.99 | one-time |


### CONFORM ™ eDiary

[App page](https://appshunter.io/ios/app/conform-ediary/id1596410090)

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

**In-app purchases:** none


## Frequently asked questions

### Is StemFox Scientific Calculator free?

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

### Is CONFORM ™ eDiary free?

CONFORM ™ eDiary is free to download, with no in-app purchases.

### Do StemFox Scientific Calculator or CONFORM ™ eDiary have ads?

Neither StemFox Scientific Calculator nor CONFORM ™ eDiary shows ads.

### Which is updated more often, StemFox Scientific Calculator or CONFORM ™ eDiary?

StemFox Scientific Calculator ships an update every 3 months, and CONFORM ™ eDiary every 2 months. Most recently, StemFox Scientific Calculator was updated on October 25, 2026 and CONFORM ™ eDiary on October 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.*