# Duotone Image Effect vs SpectrAI

The clearest difference is ads: SpectrAI at none against Duotone Image Effect's shown. SpectrAI also leads on update cadence (weekly vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Duotone Image Effect ships an update every 2 months, SpectrAI weekly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Duotone Image Effect | SpectrAI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Weekly** |
| Size | 18 MB | 38 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ryouhei Azuma](https://appshunter.io/developer/1353297781) | [James Campbell](https://appshunter.io/developer/1778993871) |

## What reviewers say

### Duotone Image Effect

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

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

**In-app purchases:** none


### SpectrAI

[App page](https://appshunter.io/ios/app/spectrai/id6758031502)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Duotone Image Effect free?

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

### Is SpectrAI free?

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

### Do Duotone Image Effect or SpectrAI have ads?

Duotone Image Effect shows ads; SpectrAI does not.

### Which is updated more often, Duotone Image Effect or SpectrAI?

Duotone Image Effect ships an update every 2 months, and SpectrAI weekly. Most recently, Duotone Image Effect was updated on October 30, 2026 and SpectrAI 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.*