# Houstudia Calculator vs Notelys

The clearest difference is price: Houstudia Calculator at Free against Notelys's $0.29. Houstudia Calculator also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.0). Notelys's advantage is update cadence (every 4 days vs every 2 months). On in-app purchases and device support there is nothing between them.

Houstudia Calculator is free to download; Notelys costs $0.29 up front. Neither carries in-app purchases, so what you see is what you pay.

Houstudia Calculator ships an update every 2 months, Notelys every 4 days. The most recent releases landed on October 1, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Houstudia Calculator | Notelys |
| --- | --- | --- |
| Price | **Free** | $0.29 |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 4 days** |
| Size | 20 MB | 5 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [Houstudia](https://appshunter.io/developer/1848855363) | [Kerem Gonlkrmaz](https://appshunter.io/developer/1882973074) |

## What reviewers say

### Houstudia Calculator

[App page](https://appshunter.io/ios/app/houstudia-calculator/id6754558086)

**Features:** macOS Compatibility

**In-app purchases:** none


### Notelys

[App page](https://appshunter.io/ios/app/notelys-smart-voice-notes/id6760238553)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Houstudia Calculator free?

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

### Is Notelys free?

Notelys costs $0.29, with no in-app purchases.

### Do Houstudia Calculator or Notelys have ads?

Notelys shows ads; Houstudia Calculator does not.

### Which is updated more often, Houstudia Calculator or Notelys?

Houstudia Calculator ships an update every 2 months, and Notelys every 4 days. Most recently, Houstudia Calculator was updated on October 1, 2026 and Notelys on October 11, 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.*