# Owlculator vs Nok

The clearest difference is in-app purchases: Nok at none against Owlculator's 1. Nok also leads on iOS requirement (15.0 vs 17.0). Owlculator's advantage is ads (none vs shown) and update cadence (every 4 days vs monthly). On price and device support there is nothing between them.

Both are free to download. Owlculator sells 1 one-off in-app purchase. Nok asks for nothing beyond the download.

Owlculator ships an update every 4 days, Nok monthly. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Owlculator | Nok |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/owlculator-math-notes/id6761601067/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Monthly |
| Size | 2 MB | 48 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fishington Studios](https://appshunter.io/developer/344044425) | [JAEMIN LEE](https://appshunter.io/developer/1787329213) |

## What reviewers say

### Owlculator

[App page](https://appshunter.io/ios/app/owlculator-math-notes/id6761601067)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Pro | $4.99 | one-time |


### Nok

[App page](https://appshunter.io/ios/app/nok-voice-recorder/id6782387669)

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

**In-app purchases:** none


## Frequently asked questions

### Is Owlculator free?

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

### Is Nok free?

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

### Do Owlculator or Nok have ads?

Nok shows ads; Owlculator does not.

### Which is updated more often, Owlculator or Nok?

Owlculator ships an update every 4 days, and Nok monthly. Most recently, Owlculator was updated on October 24, 2026 and Nok on October 12, 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.*