# Underlairs vs Emvron

The clearest difference is update cadence: Emvron at every 5 days against Underlairs's every 3 weeks. Underlairs's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Underlairs sells 3 in-app purchases, starting at $0.99 per month and Emvron sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Underlairs ships an update every 3 weeks, Emvron every 5 days. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Underlairs | Emvron |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/underlairs-focus-study-timer/id6755931983/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Freemium | — |
| Size | 230 MB | 17 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [John Jang](https://appshunter.io/developer/1857417631) | [Jaehoon Lee](https://appshunter.io/developer/1889076539) |

## 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 |


### Emvron

[App page](https://appshunter.io/ios/app/emvron-shift-schedule-and-pay/id6765544703)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Emvron Pro Monthly | $2.99 | per month |
| Emvron Pro Yearly | $17.99 | per year |
| Emvron Pro Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is Underlairs free?

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

### Is Emvron free?

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

### Do Underlairs or Emvron have ads?

Neither Underlairs nor Emvron shows ads.

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

Underlairs ships an update every 3 weeks, and Emvron every 5 days. Most recently, Underlairs was updated on October 24, 2026 and Emvron on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*