# ThreadMaster vs Quatuorvigintuple Calc

The clearest difference is in-app purchases: Quatuorvigintuple Calc at none against ThreadMaster's 10. ThreadMaster's advantage is update cadence (every 4 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ThreadMaster sells 10 in-app purchases, starting at $3.99 per month. Quatuorvigintuple Calc asks for nothing beyond the download.

ThreadMaster ships an update every 4 days, Quatuorvigintuple Calc every 2 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | ThreadMaster | Quatuorvigintuple Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (11 ratings)](https://appshunter.io/ios/app/threadmaster/id6455370741/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 102 MB | 36 MB |
| Requires iOS | 16.0 | **15.8.3** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Kazumasa Shimomura](https://appshunter.io/developer/1110502851) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### ThreadMaster

[App page](https://appshunter.io/ios/app/threadmaster/id6455370741)

Browse multiple forums and communities with advanced features like NG filters, unread tracking, and dark mode. Save favorite threads, track browsing history, and participate in discussions. Optimized for fast, organized reading on various devices.

**Highlights:** Multi-forum browsing, NG filters (threads, boards, regex), Unread tracking, Favorites and history, Dark mode, Thumbnail and link previews, Thread creation and posting

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIPプラン | $3.99 | per month |
| VIPプラン | $34.99 | per year |
| Donation | $0.29 | one-time |
| Donation | $0.49 | one-time |
| Donation | $2.99 | one-time |
| Donation | $5.99 | one-time |
| Donation | $9.99 | one-time |
| Lifetime VIP | $59.99 | one-time |
| Donation | $199.99 | one-time |
| Donation | $599.99 | one-time |


### Quatuorvigintuple Calc

[App page](https://appshunter.io/ios/app/quatuorvigintuple-calc/id6742525996)

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

**In-app purchases:** none


## Frequently asked questions

### Is ThreadMaster free?

ThreadMaster is free to download, with in-app purchases available.

### Is Quatuorvigintuple Calc free?

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

### Do ThreadMaster or Quatuorvigintuple Calc have ads?

Both ThreadMaster and Quatuorvigintuple Calc show ads.

### Which is updated more often, ThreadMaster or Quatuorvigintuple Calc?

ThreadMaster ships an update every 4 days, and Quatuorvigintuple Calc every 2 weeks. Most recently, ThreadMaster was updated on November 3, 2026 and Quatuorvigintuple Calc on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*