# eLK Signature vs RIS LogBook

The clearest difference is update cadence: eLK Signature at every 4 days against RIS LogBook's monthly. 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.

eLK Signature ships an update every 4 days, RIS LogBook monthly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | eLK Signature | RIS LogBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Monthly |
| Size | 16 MB | 25 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Digital Control](https://appshunter.io/developer/1507814890) | [Studio Lasso](https://appshunter.io/developer/1145321974) |

## What reviewers say

### eLK Signature

[App page](https://appshunter.io/ios/app/elk-signature/id6762343220)

**In-app purchases:** none


### RIS LogBook

[App page](https://appshunter.io/ios/app/ris-logbook/id6775278994)

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

**In-app purchases:** none


## Frequently asked questions

### Is eLK Signature free?

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

### Is RIS LogBook free?

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

### Do eLK Signature or RIS LogBook have ads?

Neither eLK Signature nor RIS LogBook shows ads.

### Which is updated more often, eLK Signature or RIS LogBook?

eLK Signature ships an update every 4 days, and RIS LogBook monthly. Most recently, eLK Signature was updated on November 5, 2026 and RIS LogBook 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.*