# Undulate vs Regulate

The clearest difference is iOS requirement: Undulate at 16.0 against Regulate's 18.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Undulate sells 1 one-off in-app purchase and Regulate sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Undulate | Regulate |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | — |
| Size | 1 MB | 144 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Abhishek Gawde](https://appshunter.io/developer/1853271112) | [Andrew Arbo](https://appshunter.io/developer/1895109167) |

## What reviewers say

### Undulate

[App page](https://appshunter.io/ios/app/undulate/id6758805133)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Undulate Premium | $3.99 | one-time |


### Regulate

[App page](https://appshunter.io/ios/app/regulate-breathwork-and-sleep/id6762984829)

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Regulate Pro — Monthly | $3.99 | per month |
| Regulate Pro Yearly | $24.99 | per year |
| Regulate Pro — Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Undulate free?

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

### Is Regulate free?

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

### Do Undulate or Regulate have ads?

Neither Undulate nor Regulate shows ads.

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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.*