# ELM vs Knowuro reader

The clearest difference is update cadence: Knowuro reader at every 4 weeks against ELM's every 15 months. Knowuro reader also leads on iOS requirement (14.0 vs 16.6). 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.

ELM ships an update every 15 months, Knowuro reader every 4 weeks. The most recent releases landed on September 13, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | ELM | Knowuro reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 4 weeks** |
| Size | 43 MB | 24 MB |
| Requires iOS | 16.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Stacks Inc.](https://appshunter.io/developer/1275752393) | [Knowuro](https://appshunter.io/developer/1728721237) |

## What reviewers say

### ELM

[App page](https://appshunter.io/ios/app/elm-jordan/id6464537407)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Knowuro reader

[App page](https://appshunter.io/ios/app/knowuro-reader/id6477208617)

**In-app purchases:** none


## Frequently asked questions

### Is ELM free?

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

### Is Knowuro reader free?

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

### Do ELM or Knowuro reader have ads?

Neither ELM nor Knowuro reader shows ads.

### Which is updated more often, ELM or Knowuro reader?

ELM ships an update every 15 months, and Knowuro reader every 4 weeks. Most recently, ELM was updated on September 13, 2026 and Knowuro reader 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.*