# Undertone Beauty vs I.O.

The clearest difference is update cadence: I.O. at every 2 days against Undertone Beauty's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Undertone Beauty sells 2 in-app purchases, starting at $20.00 per month and I.O. sells 1 in-app purchase, starting at $10.00 per month. Whichever you choose, the download price is not the number that matters.

Undertone Beauty ships an update monthly, I.O. every 2 days. The most recent releases landed on October 28, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Undertone Beauty | I.O. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/undertone-beauty/id6760133157/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Freemium | — |
| Size | 41 MB | 34 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Undertone Beauty Inc.](https://appshunter.io/developer/1882810603) | [IO.OI. Inc.](https://appshunter.io/developer/1891882426) |

## What reviewers say

### Undertone Beauty

[App page](https://appshunter.io/ios/app/undertone-beauty/id6760133157)

A professional workflow app for makeup artists that combines undertone support, intelligent product recommendations, and client organization. It helps artists manage client details, track product usage, and plan future events with precision and confidence.

**Highlights:** Undertone analysis and recommendations, Client organization and notes, Product tracking, Personalized artistry tools, Event planning

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Undertone Pro Monthly | $20.00 | per month |
| Undertone Pro Yearly | $199.00 | per year |


### I.O.

[App page](https://appshunter.io/ios/app/io/id6761871771)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IO Pro | $10.00 | per month |


## Frequently asked questions

### Is Undertone Beauty free?

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

### Is I.O. free?

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

### Do Undertone Beauty or I.O. have ads?

Neither Undertone Beauty nor I.O. shows ads.

### Which is updated more often, Undertone Beauty or I.O.?

Undertone Beauty ships an update monthly, and I.O. every 2 days. Most recently, Undertone Beauty was updated on October 28, 2026 and I.O. on November 5, 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.*