# +Doku vs kontekst lens

The clearest difference is update cadence: kontekst lens at monthly against +Doku's every 2 months. +Doku's advantage is iOS requirement (10.3 vs 15.5). 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.

+Doku ships an update every 2 months, kontekst lens monthly. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | +Doku | kontekst lens |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Size | 54 MB | 83 MB |
| Requires iOS | **10.3** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [X-Interchange GmbH](https://appshunter.io/developer/1438909423) | [Kontekst Software UG (haftungsbeschrankt)](https://appshunter.io/developer/1736101278) |

## What reviewers say

### +Doku

[App page](https://appshunter.io/ios/app/plus-doku/id1438911531)

**Features:** macOS Compatibility

**In-app purchases:** none


### kontekst lens

[App page](https://appshunter.io/ios/app/kontekst-lens/id6479527143)

**In-app purchases:** none


## Frequently asked questions

### Is +Doku free?

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

### Is kontekst lens free?

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

### Do +Doku or kontekst lens have ads?

Neither +Doku nor kontekst lens shows ads.

### Which is updated more often, +Doku or kontekst lens?

+Doku ships an update every 2 months, and kontekst lens monthly. Most recently, +Doku was updated on October 26, 2026 and kontekst lens on October 25, 2026.

---

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