# Ka vs Sci

Ka and Sci both sit at 4.0 stars, but that hides the real split: 56% of Sci's written reviews are positive against 25% of Ka's. Ka's advantage is monetization model (ad-supported vs free with in-app purchases) and iOS requirement (9.3 vs 18). On price, rating, ratings volume and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.0 for Ka against 3.9 for Sci. Both are backed by a comparable volume of ratings — 6 and 14 respectively. Written reviews are what separate them: 25% of Ka's written reviews are positive against 56% of Sci's.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 12, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Ka | Sci |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (6 ratings)](https://appshunter.io/ios/app/ka-ching/id371186181/reviews)** | [3.9 (14 ratings)](https://appshunter.io/ios/app/sci-fi-sounds-and-noises/id477955120/reviews) |
| Number of ratings | 6 | **14** |
| Positive reviews | 25.0% of reviews | **56.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 17 MB | 15 MB |
| Requires iOS | **9.3** | 18 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [The Ritz Acme Ltd Liability Company](https://appshunter.io/developer/952868106) | [iGreenEarth](https://appshunter.io/developer/351081815) |

## What reviewers say

### Ka

[App page](https://appshunter.io/ios/app/ka-ching/id371186181)

This novelty app provides four distinct "Ka-Ching!" sound effects for entertainment. Users can swipe the screen and tap a button to play sounds, with an added gravity feature that makes the button move with the phone. It's designed for fun and pranks, requiring no internet connection.

**Highlights:** Multiple "Ka-Ching!" sound effects, Interactive screen swipe and button tap, Gravity-enabled button movement, Offline functionality, Novelty and prank use

**Features:** macOS Compatibility

**In-app purchases:** none


### Sci

[App page](https://appshunter.io/ios/app/sci-fi-sounds-and-noises/id477955120)

Explore a universe of over 50 unique science fiction sound effects. This app offers a diverse collection of interstellar noises, from alien calls and laser blasts to spaceship engines and robotic chatter.

**Highlights:** Over 50 sci-fi sound effects, Alien sounds, Laser sounds, Spaceship sounds, Robot sounds, Weapon sounds, Mood music

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ka free?

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

### Is Sci free?

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

### Which has better reviews, Ka or Sci?

Ka is rated higher. Ka averages 4.0 out of 5 from 6 ratings, while Sci averages 3.9 from 14 ratings.

### Do Ka or Sci have ads?

Both Ka and Sci show ads.

### Which is updated more often, Ka or Sci?

Ka ships an update every 4 months, and Sci every 4 months. Most recently, Ka was updated on October 12, 2026 and Sci on October 22, 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.*