# CTA Go vs World Sounds

The clearest difference is price: CTA Go at Free against World Sounds's $2.99. CTA Go also leads on iOS requirement (13.0 vs 15.0). World Sounds's advantage is update cadence (monthly vs every 15 months). On ads, in-app purchases and device support there is nothing between them.

CTA Go is free to download; World Sounds costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CTA Go ships an update every 15 months, World Sounds monthly. Both last shipped on November 3, 2026.

## The numbers

| Metric | CTA Go | World Sounds |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Monthly** |
| Monetization | — | Paid |
| Size | 26 MB | 7 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CTA AG](https://appshunter.io/developer/1439574606) | [Carlos Obando](https://appshunter.io/developer/818523453) |

## What reviewers say

### CTA Go

[App page](https://appshunter.io/ios/app/cta-go/id1667557186)

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

**In-app purchases:** none


### World Sounds

[App page](https://appshunter.io/ios/app/world-sounds-detector/id6444348730)

This AI-powered application detects and alerts you to over 300 different sounds, including human noises, animals, and various items. It offers customizable haptic, sound, and push notifications for immediate awareness. Supports 35 languages and is optimized for newer iPhone models.

**Highlights:** AI sound identification, Over 300 sound types, Haptic alerts, Sound alerts, Push notifications, 35 language support

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is CTA Go free?

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

### Is World Sounds free?

World Sounds costs $2.99, with no in-app purchases.

### Do CTA Go or World Sounds have ads?

Neither CTA Go nor World Sounds shows ads.

### Which is updated more often, CTA Go or World Sounds?

CTA Go ships an update every 15 months, and World Sounds monthly. Most recently, CTA Go was updated on November 3, 2026 and World Sounds on November 3, 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.*