# Duovigintuple Calc vs Octo Browser

The clearest difference is ads: Octo Browser at none against Duovigintuple Calc's shown. Octo Browser also leads on update cadence (every 6 days vs every 2 weeks). Duovigintuple Calc's advantage is iOS requirement (15.8.3 vs 17.0). On price, in-app purchases and device support there is nothing between them.

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

Duovigintuple Calc ships an update every 2 weeks, Octo Browser every 6 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Duovigintuple Calc | Octo Browser |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.8 (23 ratings)](https://appshunter.io/ios/app/octo-browser/id6762627194/reviews)** |
| Number of ratings | — | **23** |
| Positive reviews | — | 53.3% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 6 days** |
| Monetization | — | Free |
| Size | 36 MB | 16 MB |
| Requires iOS | **15.8.3** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [BLACKBIRD SECURE BROWSING LTD](https://appshunter.io/developer/1894881205) |

## What reviewers say

### Duovigintuple Calc

[App page](https://appshunter.io/ios/app/duovigintuple-calc/id6742525847)

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

**In-app purchases:** none


### Octo Browser

[App page](https://appshunter.io/ios/app/octo-browser/id6762627194)

This private browser allows you to create separate profiles for different online activities, ensuring your cookies, cache, and history remain isolated. Easily switch between work, personal, or research contexts without data leakage.

**Highlights:** Independent browser profiles, Isolated cookies and cache, Separate browsing history, Customizable browser identification, Proxy support (HTTP, HTTPS, SOCKS5), Instant profile switching

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

**In-app purchases:** none


## Frequently asked questions

### Is Duovigintuple Calc free?

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

### Is Octo Browser free?

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

### Do Duovigintuple Calc or Octo Browser have ads?

Duovigintuple Calc shows ads; Octo Browser does not.

### Which is updated more often, Duovigintuple Calc or Octo Browser?

Duovigintuple Calc ships an update every 2 weeks, and Octo Browser every 6 days. Most recently, Duovigintuple Calc was updated on October 24, 2026 and Octo Browser on October 31, 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.*