# 93.3 KIOA vs CentiGrade Visual Tuner

The clearest difference is price: 93.3 KIOA at Free against CentiGrade Visual Tuner's $0.99. CentiGrade Visual Tuner's advantage is update cadence (every 4 days vs every 11 months) and iOS requirement (13.0 vs 15.6). On rating, ratings volume, ads and in-app purchases there is nothing between them.

93.3 KIOA is free to download; CentiGrade Visual Tuner costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for 93.3 KIOA against 5.0 for CentiGrade Visual Tuner. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

93.3 KIOA ships an update every 11 months, CentiGrade Visual Tuner every 4 days. The most recent releases landed on July 22, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 93.3 KIOA | CentiGrade Visual Tuner |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/933-kioa/id6535691441/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/centigrade-visual-tuner/id6758646319/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 4 days** |
| Monetization | **Free** | Paid |
| Size | 23 MB | 18 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Saga Communications](https://appshunter.io/developer/333180331) | [PHILIP BRADLEY KING](https://appshunter.io/developer/1874172215) |

## What reviewers say

### 93.3 KIOA

[App page](https://appshunter.io/ios/app/933-kioa/id6535691441)

Stream Des Moines' Greatest Hits live and connect with local radio personalities. Send song requests, provide feedback, and stay updated on Central Iowa happenings through this music application.

**Highlights:** Live music streaming, Connect with radio hosts, Send song requests, Provide feedback, Local Central Iowa updates

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

**In-app purchases:** none


### CentiGrade Visual Tuner

[App page](https://appshunter.io/ios/app/centigrade-visual-tuner/id6758646319)

This app provides instant, ad-free tuning with a unique rolling trace feature for pitch practice. Its interface dynamically zooms as you approach the target note, offering multiple visual modes and presets for various instruments.

**Highlights:** Instant tuning on launch, Rolling trace for pitch history, Dynamic zoom interface, Fluid wave visualizer, Chromatic, Guitar, Bass presets

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 93.3 KIOA free?

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

### Is CentiGrade Visual Tuner free?

CentiGrade Visual Tuner costs $0.99, with no in-app purchases.

### Which has better reviews, 93.3 KIOA or CentiGrade Visual Tuner?

93.3 KIOA and CentiGrade Visual Tuner are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do 93.3 KIOA or CentiGrade Visual Tuner have ads?

Neither 93.3 KIOA nor CentiGrade Visual Tuner shows ads.

### Which is updated more often, 93.3 KIOA or CentiGrade Visual Tuner?

93.3 KIOA ships an update every 11 months, and CentiGrade Visual Tuner every 4 days. Most recently, 93.3 KIOA was updated on July 22, 2026 and CentiGrade Visual Tuner on September 9, 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.*