# Radar Chart vs Whistling Level

The clearest difference is update cadence: Whistling Level at every 2 weeks against Radar Chart's every 11 months. 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.

Radar Chart ships an update every 11 months, Whistling Level every 2 weeks. The most recent releases landed on September 25, 2026 and August 4, 2026 respectively.

## The numbers

| Metric | Radar Chart | Whistling Level |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (251 ratings)](https://appshunter.io/ios/app/radar-chart/id1500178620/reviews)** | — |
| Number of ratings | **251** | — |
| Positive reviews | 71.7% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 11 months | **Every 2 weeks** |
| Monetization | Ad-supported | — |
| Size | 19 MB | 47 MB |
| Requires iOS | **14.0** | 15.8.3 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kazuya Fujita](https://appshunter.io/developer/1358322690) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### Radar Chart

[App page](https://appshunter.io/ios/app/radar-chart/id1500178620)

Easily create radar charts directly on your mobile device. Input chart title, number of items, item names, and data to generate your chart. Save or copy your creations with simple operations.

**Highlights:** Create radar charts, Input chart title, Define number of items, Enter item names and data, Save chart as image, Copy chart to clipboard

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

**In-app purchases:** none

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Straightforward interface
- 💡 Helpful for creating charts
- 🚀 Quick export options

**What reviewers complain about**

- 🐛 Occasional glitches and crashes
- 🔒 Forced to write a review to access all features
- 💡 Limited customization options (colors, axis values)
- 💡 Unable to save multiple charts

**Reported bugs**

- Login screen freezes
- Incompatible with older devices

**Requested features**

- Allow changing maximum values and input increments
- Add option to layer multiple data sets on one chart
- Implement a dark mode or better aesthetic design


### Whistling Level

[App page](https://appshunter.io/ios/app/whistling-level/id6749757240)

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

**In-app purchases:** none


## Frequently asked questions

### Is Radar Chart free?

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

### Is Whistling Level free?

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

### Do Radar Chart or Whistling Level have ads?

Both Radar Chart and Whistling Level show ads.

### Which is updated more often, Radar Chart or Whistling Level?

Radar Chart ships an update every 11 months, and Whistling Level every 2 weeks. Most recently, Radar Chart was updated on September 25, 2026 and Whistling Level on August 4, 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.*