# Convertfiles.ai vs Duotone Image Effect

The clearest difference is in-app purchases: Duotone Image Effect at none against Convertfiles.ai's 2. Convertfiles.ai's advantage is ads (none vs shown) and iOS requirement (13.0 vs 15.6). On price, update cadence and device support there is nothing between them.

Both are free to download. Convertfiles.ai sells 2 in-app purchases, starting at $5.00 per 7 days. Duotone Image Effect asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Convertfiles.ai | Duotone Image Effect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/convertfilesai/id6446500750/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 85 MB | 18 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shopsense Retail Technologies Limited](https://appshunter.io/developer/979824525) | [Ryouhei Azuma](https://appshunter.io/developer/1353297781) |

## What reviewers say

### Convertfiles.ai

[App page](https://appshunter.io/ios/app/convertfilesai/id6446500750)

Easily convert image files online to save storage and improve performance. Supports PNG and JPEG formats for personal and professional use. Join a global community of users leveraging this powerful tool.

**Highlights:** Image conversion tool, Supports PNG and JPEG, Save storage, Improve performance, Personal and professional use

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $5.00 | per 7 days |
| Monthly Plan | $10.00 | per month |


### Duotone Image Effect

[App page](https://appshunter.io/ios/app/duotone-image-effect/id6754188984)

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

**In-app purchases:** none


## Frequently asked questions

### Is Convertfiles.ai free?

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

### Is Duotone Image Effect free?

Duotone Image Effect is free to download, with no in-app purchases.

### Do Convertfiles.ai or Duotone Image Effect have ads?

Duotone Image Effect shows ads; Convertfiles.ai does not.

### Which is updated more often, Convertfiles.ai or Duotone Image Effect?

Convertfiles.ai ships an update every 2 months, and Duotone Image Effect every 2 months. Most recently, Convertfiles.ai was updated on November 3, 2026 and Duotone Image Effect on October 30, 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.*