# Kwartool vs Redoublet.com

The clearest difference is in-app purchases: Kwartool at none against Redoublet.com's 1. Kwartool also leads on iOS requirement (10.0 vs 15.1). Redoublet.com's advantage is update cadence (every 2 weeks vs every 24 months). On price, ads and device support there is nothing between them.

Both are free to download. Redoublet.com sells 1 in-app purchase, starting at $7.99 per month. Kwartool asks for nothing beyond the download.

Kwartool ships an update every 24 months, Redoublet.com every 2 weeks. The most recent releases landed on September 18, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Kwartool | Redoublet.com |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 2 weeks** |
| Size | 8 MB | 60 MB |
| Requires iOS | **10.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Hulan bv](https://appshunter.io/developer/1030435545) | [Christiaan Tersteeg](https://appshunter.io/developer/1719753656) |

## What reviewers say

### Kwartool

[App page](https://appshunter.io/ios/app/kwartool/id1477949226)

**In-app purchases:** none


### Redoublet.com

[App page](https://appshunter.io/ios/app/redoubletcom-bridge-app/id6749674034)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Redoublet Pro | $7.99 | per month |


## Frequently asked questions

### Is Kwartool free?

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

### Is Redoublet.com free?

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

### Do Kwartool or Redoublet.com have ads?

Neither Kwartool nor Redoublet.com shows ads.

### Which is updated more often, Kwartool or Redoublet.com?

Kwartool ships an update every 24 months, and Redoublet.com every 2 weeks. Most recently, Kwartool was updated on September 18, 2026 and Redoublet.com on September 17, 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.*