# CallStart vs High Frequency Highway

The clearest difference is in-app purchases: CallStart at none against High Frequency Highway's 10. CallStart also leads on iOS requirement (10.0 vs 15.6). High Frequency Highway's advantage is update cadence (every 8 days vs every 42 months). On price, ads and device support there is nothing between them.

Both are free to download. High Frequency Highway sells 10 in-app purchases, starting at $1.99 per 7 days. CallStart asks for nothing beyond the download.

CallStart ships an update every 42 months, High Frequency Highway every 8 days. The most recent releases landed on September 6, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | CallStart | High Frequency Highway |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (188 ratings)](https://appshunter.io/ios/app/high-frequency-highway/id1616225876/reviews)** |
| Number of ratings | — | **188** |
| Positive reviews | — | 59.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 42 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 2 MB | 246 MB |
| Requires iOS | **10.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [文土 黄](https://appshunter.io/developer/1123877695) | [J Johnson](https://appshunter.io/developer/1265627688) |

## What reviewers say

### CallStart

[App page](https://appshunter.io/ios/app/callstart/id1344649903)

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

**In-app purchases:** none


### High Frequency Highway

[App page](https://appshunter.io/ios/app/high-frequency-highway/id1616225876)

Utilize a curated library of sounds and a binaural beat generator to improve sleep, focus, and relaxation. This app aims to guide users toward higher states of awareness, promoting emotional well-being and inner peace through meditation and sound.

**Highlights:** Unique audios, Sleep sounds & melodies, Binaural beat generator, High Frequency Hub, Deep relaxation guidance

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BePositive Premium | $1.99 | per 7 days |
| Premium HF User | $6.99 | per month |
| Special offer 38% off | $59.99 | per year |
| One-time unlock of a paid creation. | $0.99 | one-time |
| Paid track | $0.99 | one-time |
| Unlock Paid Sound – $1.99 | $1.99 | one-time |
| Unlock Sound | $2.99 | one-time |
| Unlock Sound | $3.99 | one-time |
| paidplaylist | $9.99 | one-time |
| Septa Sync | $39.99 | one-time |


## Frequently asked questions

### Is CallStart free?

CallStart is free to download, with no in-app purchases.

### Is High Frequency Highway free?

High Frequency Highway is free to download, with in-app purchases available.

### Do CallStart or High Frequency Highway have ads?

Neither CallStart nor High Frequency Highway shows ads.

### Which is updated more often, CallStart or High Frequency Highway?

CallStart ships an update every 42 months, and High Frequency Highway every 8 days. Most recently, CallStart was updated on September 6, 2026 and High Frequency Highway on September 23, 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.*