# Scientific Calculator * vs Tertiary Scanner

The clearest difference is rating: Scientific Calculator * at 4.6 against Tertiary Scanner's 1.0. Scientific Calculator * also leads on update cadence (every 2 weeks vs every 5 weeks) and ratings volume (12 vs 1). Tertiary Scanner's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Scientific Calculator * sells 1 one-off in-app purchase. Tertiary Scanner asks for nothing beyond the download.

Scientific Calculator * holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Scientific Calculator * has 12 ratings behind it against 1, so its average is the more settled of the two.

Scientific Calculator * ships an update every 2 weeks, Tertiary Scanner every 5 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Scientific Calculator * | Tertiary Scanner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (12 ratings)](https://appshunter.io/ios/app/scientific-calculator/id1537346972/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/tertiary-scanner/id6779988762/reviews) |
| Number of ratings | **12** | 1 |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 86 MB | 1 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TOWER OF HANOI SOFTWARE COMPANY LIMITED](https://appshunter.io/developer/1125320041) | [Alfred Ang](https://appshunter.io/developer/1880940227) |

## What reviewers say

### Scientific Calculator *

[App page](https://appshunter.io/ios/app/scientific-calculator/id1537346972)

This app offers a comprehensive suite of calculation tools, including basic and advanced math functions, unit conversions, and financial calculators. It also features a history log for easy access to past calculations and allows for customization of themes.

**Highlights:** Basic and complex calculations, Unit and currency converter, Financial calculators (loan, discount), Calculation history log, Customizable themes, Fraction and trigonometric functions

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ad | $4.99 | one-time |


### Tertiary Scanner

[App page](https://appshunter.io/ios/app/tertiary-scanner/id6779988762)

This app transforms your device into a powerful document scanner. It automatically detects edges, corrects perspective, and enhances scanned pages with various filters. Easily export documents as PDFs or JPGs and utilize built-in OCR for text recognition and search.

**Highlights:** Automatic edge detection and perspective correction, Multiple page scanning into single documents, Image enhancement filters, PDF and JPG export, On-device OCR for text recognition, Save to Photos, Files, or iCloud Drive

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

**In-app purchases:** none


## Frequently asked questions

### Is Scientific Calculator * free?

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

### Is Tertiary Scanner free?

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

### Which has better reviews, Scientific Calculator * or Tertiary Scanner?

Scientific Calculator * is rated higher. Scientific Calculator * averages 4.6 out of 5 from 12 ratings, while Tertiary Scanner averages 1.0 from 1 ratings.

### Do Scientific Calculator * or Tertiary Scanner have ads?

Scientific Calculator * shows ads; Tertiary Scanner does not.

### Which is updated more often, Scientific Calculator * or Tertiary Scanner?

Scientific Calculator * ships an update every 2 weeks, and Tertiary Scanner every 5 weeks. Most recently, Scientific Calculator * was updated on October 24, 2026 and Tertiary Scanner on October 25, 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.*