# CircleTwirl vs SONAR Deep Dive

The clearest difference is update cadence: SONAR Deep Dive at every 2 days against CircleTwirl's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CircleTwirl ships an update every 2 weeks, SONAR Deep Dive every 2 days. The most recent releases landed on October 17, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | CircleTwirl | SONAR Deep Dive |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 147 MB | 145 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [建宁 周](https://appshunter.io/developer/6773814970) | [博 郑](https://appshunter.io/developer/6788115634) |

## What reviewers say

### CircleTwirl

[App page](https://appshunter.io/ios/app/circletwirl/id6793505024)

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

**In-app purchases:** none


### SONAR Deep Dive

[App page](https://appshunter.io/ios/app/sonar-deep-dive/id6798673505)

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

**In-app purchases:** none


## Frequently asked questions

### Is CircleTwirl free?

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

### Is SONAR Deep Dive free?

SONAR Deep Dive is free to download, with no in-app purchases.

### Do CircleTwirl or SONAR Deep Dive have ads?

Both CircleTwirl and SONAR Deep Dive show ads.

### Which is updated more often, CircleTwirl or SONAR Deep Dive?

CircleTwirl ships an update every 2 weeks, and SONAR Deep Dive every 2 days. Most recently, CircleTwirl was updated on October 17, 2026 and SONAR Deep Dive on October 6, 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.*