# Copiosus vs Duo Messenger

The clearest difference is update cadence: Duo Messenger at every 9 days against Copiosus's every 4 months. Duo Messenger also leads on iOS requirement (15.0 vs 17.6). On price, ads, 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.

Copiosus ships an update every 4 months, Duo Messenger every 9 days. The most recent releases landed on August 27, 2026 and August 16, 2026 respectively.

## The numbers

| Metric | Copiosus | Duo Messenger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.3 (3 ratings)](https://appshunter.io/ios/app/duo-messenger/id6503286911/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 9 days** |
| Monetization | — | Free |
| Size | 4 MB | 44 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Verbosus.com](https://appshunter.io/developer/560869166) | [JUSI PTE.LTD.](https://appshunter.io/developer/1659814629) |

## What reviewers say

### Copiosus

[App page](https://appshunter.io/ios/app/copiosus/id1475444882)

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

**In-app purchases:** none


### Duo Messenger

[App page](https://appshunter.io/ios/app/duo-messenger/id6503286911)

This secure messaging app prioritizes your privacy with end-to-end encryption and anonymous communication. It offers a clean, ad-free experience, allowing you to chat without revealing personal contact information.

**Highlights:** End-to-end message encryption, Anonymous communication via Duo Numbers, No ads or trackers, Private contact information, Secure data safeguarding

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

**In-app purchases:** none


## Frequently asked questions

### Is Copiosus free?

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

### Is Duo Messenger free?

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

### Do Copiosus or Duo Messenger have ads?

Neither Copiosus nor Duo Messenger shows ads.

### Which is updated more often, Copiosus or Duo Messenger?

Copiosus ships an update every 4 months, and Duo Messenger every 9 days. Most recently, Copiosus was updated on August 27, 2026 and Duo Messenger on August 16, 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.*