# Scientific Calculator * vs Ongo Audit

The clearest difference is in-app purchases: Ongo Audit at none against Scientific Calculator *'s 1. Ongo Audit also leads on ads (none vs shown). Scientific Calculator *'s advantage is update cadence (every 2 weeks vs every 5 weeks) and device support (3 vs 1). On price there is nothing between them.

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

Scientific Calculator * ships an update every 2 weeks, Ongo Audit every 5 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | Scientific Calculator * | Ongo Audit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (12 ratings)](https://appshunter.io/ios/app/scientific-calculator/id1537346972/reviews)** | — |
| Number of ratings | **12** | — |
| 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 | — |
| Size | 86 MB | 38 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [TOWER OF HANOI SOFTWARE COMPANY LIMITED](https://appshunter.io/developer/1125320041) | [Taskworld Inc.](https://appshunter.io/developer/734235767) |

## 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 |


### Ongo Audit

[App page](https://appshunter.io/ios/app/ongo-audit/id6761755886)

**In-app purchases:** none


## Frequently asked questions

### Is Scientific Calculator * free?

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

### Is Ongo Audit free?

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

### Do Scientific Calculator * or Ongo Audit have ads?

Scientific Calculator * shows ads; Ongo Audit does not.

### Which is updated more often, Scientific Calculator * or Ongo Audit?

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