Radar Chart vs Whistling Level
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Radar Chart
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.
- Create radar charts
- Input chart title
- Define number of items
- Enter item names and data
- Save chart as image
- Copy chart to clipboard
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I want to make a radar chart, but it is troublesome to start up a personal computer. Please use this app in such a case! Creating a radar chart is possible only by inputting the following four items. - Chart title - Number of items - item name - Data for each item The created chart can be saved as an image or copied to the clipboard. Please contact us in the review section or this DM. https://twitter.com/corasck
Whistling Level
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Check your whistling level and evaluate with a score
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Radar Chart | Whistling Level |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (251 ratings) — better | — |
| Positive reviews | 71.7% of reviews | — |
| Number of ratings | 251 — better | — |
| Update frequency | Every 11 months | Every 2 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 14.0 — better | 15.8.3 |
| Further details — not scored | ||
| Size | 19 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | Kazuya Fujita | Hideaki Uchikoshi |
Bugs and requests
Radar Chart
Reported bugs
2 issues- Login screen freezes
- Incompatible with older devices
Requested features
3 requests- 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
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Radar Chart
No in-app purchases
Whistling Level
No in-app purchases
Questions
Is Radar Chart free?
Is Whistling Level free?
Do Radar Chart or Whistling Level have ads?
Which is updated more often, Radar Chart or Whistling Level?
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