# Humming Scheduler vs Liminal Flow

The clearest difference is price: Liminal Flow at Free against Humming Scheduler's $1.99. Liminal Flow also leads on update cadence (every 2 months vs every 40 months). Humming Scheduler's advantage is in-app purchases (none vs 4) and iOS requirement (12.1 vs 16.0). On ads and device support there is nothing between them.

Liminal Flow is free to download; Humming Scheduler costs $1.99 up front. Liminal Flow sells 4 in-app purchases, starting at $4.99 per month. Humming Scheduler asks for nothing beyond the download.

Humming Scheduler ships an update every 40 months, Liminal Flow every 2 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Humming Scheduler | Liminal Flow |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/liminal-flow/id6445901345/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 29 MB | 105 MB |
| Requires iOS | **12.1** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Best Health](https://appshunter.io/developer/1556826580) | [Liminal Flow LLC](https://appshunter.io/developer/1669795723) |

## What reviewers say

### Humming Scheduler

[App page](https://appshunter.io/ios/app/humming-scheduler/id1556826578)

**Features:** macOS Compatibility

**In-app purchases:** none


### Liminal Flow

[App page](https://appshunter.io/ios/app/liminal-flow/id6445901345)

Experience immersive soundscapes designed for meditation, sleep, focus, and deep relaxation. This app generates unique, evolving audio experiences to help regulate your nervous system and cultivate presence. It supports various uses, from personal wellness to professional client sessions.

**Highlights:** Infinitely evolving soundscapes, Supports sleep and meditation, Enhances focus and creativity, Nervous system regulation, Designed for deep listening, Sound refuge for relaxation

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Monthly | $9.99 | per month |
| Annual | $39.99 | per year |
| Annual | $59.99 | per year |


## Frequently asked questions

### Is Humming Scheduler free?

Humming Scheduler costs $1.99, with no in-app purchases.

### Is Liminal Flow free?

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

### Do Humming Scheduler or Liminal Flow have ads?

Neither Humming Scheduler nor Liminal Flow shows ads.

### Which is updated more often, Humming Scheduler or Liminal Flow?

Humming Scheduler ships an update every 40 months, and Liminal Flow every 2 months. Most recently, Humming Scheduler was updated on October 25, 2026 and Liminal Flow on October 24, 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.*