BTWATTCH vs Radar Chart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BTWATTCH
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ラトックシステムのワットチェッカーREX-BTWATTCH1で計測された消費電力・電流・電圧など各種データを表示するアプリケーションです。 ■主な機能 1)消費電力・電流・電圧をリアルタイム表示 2)消費電力量を電気料金・CO2排出量に換算表示 3)消費電力量を1時間・１日・1ヶ月単位でグラフ表示 4)計測データをCSVファイル保存 最新版のマニュアルは以下のURLをご覧ください。 https://www.ratocsystems.com/pdffile/eco/btwattch1.pdf
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
Screenshots
Verdict
The clearest difference is ads: BTWATTCH at none against Radar Chart's shown. BTWATTCH also leads on update cadence (every 2 months vs every 11 months) and iOS requirement (9.0 vs 14.0). On price, 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.
BTWATTCH ships an update every 2 months, Radar Chart every 11 months. The most recent releases landed on May 16, 2026 and September 25, 2026 respectively.
| Parameter | BTWATTCH | Radar Chart |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (251 ratings) — better |
| Positive reviews | — | 71.7% of reviews |
| Number of ratings | — | 251 — better |
| Update frequency | Every 2 months — better | Every 11 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 1 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | RATOC Systems, Inc. | Kazuya Fujita |
Bugs and requests
BTWATTCH
Not enough reviews yet to summarise bugs or 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
In-app purchases
BTWATTCH
No in-app purchases
Radar Chart
No in-app purchases
