# Underlairs vs Peekmo

The clearest difference is ads: Underlairs at none against Peekmo's shown. Underlairs also leads on device support (3 vs 1). Peekmo's advantage is update cadence (every 4 days vs every 3 weeks). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Underlairs sells 3 in-app purchases, starting at $0.99 per month and Peekmo sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Underlairs ships an update every 3 weeks, Peekmo every 4 days. The most recent releases landed on September 23, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Underlairs | Peekmo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/underlairs-focus-study-timer/id6755931983/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Freemium | — |
| Size | 230 MB | 49 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [John Jang](https://appshunter.io/developer/1857417631) | [JEONG HYEON CHOI](https://appshunter.io/developer/1868684820) |

## What reviewers say

### Underlairs

[App page](https://appshunter.io/ios/app/underlairs-focus-study-timer/id6755931983)

Enhance concentration and memory with curated ambient soundscapes and a focus timer. Choose from unique 'Lairs' and track your progress to achieve deep work and productivity goals.

**Highlights:** Focus Timer with customizable durations, Beast Mode for continuous music, Ambient soundscape playlists, Background playback, Lock screen controls, Stats tracking for focus minutes and streaks, Minimalist design

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $0.99 | per month |
| Yearly Premium | $9.99 | per year |
| Premium Lifetime Access | $17.99 | one-time |


### Peekmo

[App page](https://appshunter.io/ios/app/peekmo-lock-screen-notes/id6800045634)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 커피 한 잔 | $0.49 | one-time |
| 커피 세 잔 | $1.99 | one-time |
| 커피 다섯 잔 | $2.99 | one-time |


## Frequently asked questions

### Is Underlairs free?

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

### Is Peekmo free?

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

### Do Underlairs or Peekmo have ads?

Peekmo shows ads; Underlairs does not.

### Which is updated more often, Underlairs or Peekmo?

Underlairs ships an update every 3 weeks, and Peekmo every 4 days. Most recently, Underlairs was updated on September 23, 2026 and Peekmo on September 28, 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.*