Sunlight Checker vs 引っ越しTodo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sunlight Checker
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Will your next home actually get sunlight? "South-facing" on the listing doesn't tell you what the buildings around it do to the sun. Sunlight Checker computes real sunlight hours for any address in Japan's major cities. Tap the map and it simulates the sun's path for all 12 months, using the Japanese government's official PLATEAU 3D city model to account for shadows cast by the surrounding buildings. PLATEAU reflects buildings as of the date they were surveyed, so buildings constructed or demolished since then may not be reflected — the results screen shows the survey year so you can judge. FREE FEATURES - Sunlight hours per month and yearly average, scored S to D - Floor selector — see how sunlight changes from the 1st to the top floor - Building details: height, storeys, zoning, building-coverage ratio, floor-area ratio, flood and landslide risk (PLATEAU attributes, availability varies by city) - Save up to 1,000 favorite locations - 3D map and satellite imagery - iPhone Duo support: unfold to see the details and the map side by side PRO FEATURES - Hourly timeline in 15-minute steps - 3D shadow visualization, with a one-line answer: does this floor get sun at the time you pick? - Direction filter (south-facing windows only, etc.) COVERAGE Tokyo 23 wards, Yokohama, Kawasaki, Osaka, Nagoya, Fukuoka, Sapporo, Saitama and other major cities. PRIVACY All computation happens on your device. Searched addresses are never sent to a server. Note: The app interface is currently Japanese only. The map and numeric results are easy to follow, and this page's screenshots show exactly what you'll see. Privacy policy: https://sunlightchecker.remosia.biz/privacy.html Terms: https://sunlightchecker.remosia.biz/terms.html Building data: Ministry of Land, Infrastructure, Transport and Tourism (MLIT) PLATEAU, adapted (https://www.mlit.go.jp/plateau/)
引っ越しTodo
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【引っ越しTodo】 引っ越し手続きを漏れなく完了できるチェックリスト 【こんな悩みを解決】 ・転出届や電気・ガスの手続き漏れで後から慌てる ・引っ越し前後でやることが多すぎて整理できない ・手続きの期限を忘れて罰金や不便を経験する 【主な機能】 ・メイン画面: チェックリスト一覧 ・追加/編集画面: 項目の追加・編集 ・設定画面: Pro購入・設定 ・進捗画面: 完了状況の可視化 【特徴】 転出届・電気・ガスなどの必須手続きをプリセットで網羅 期限管理で手続き漏れを防止 進捗が一目でわかるシンプルなチェックリスト 【使い方】 1. アプリを開く 2. データを入力 3. 結果を確認 シンプルで使いやすい引っ越しTodoを今すぐお試しください。 【利用規約】 https://suzukimari.com/terms/ 【プライバシーポリシー】 https://suzukimari.com/privacy-policy.html
Screenshots
Verdict
The clearest difference is in-app purchases: 引っ越しTodo at none against Sunlight Checker's 2. 引っ越しTodo also leads on update cadence (every 2 months vs every 4 months). On price, ads, device support and iOS requirement 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. Sunlight Checker sells 2 in-app purchases, starting at $1.99 per month. 引っ越しTodo asks for nothing beyond the download.
Sunlight Checker ships an update every 4 months, 引っ越しTodo every 2 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | Sunlight Checker | 引っ越しTodo |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | 株式会社リモシア | Mari Suzuki |
In-app purchases
Sunlight Checker
- 月額プラン$1.991 Month
- 年額プラン(お得)$14.991 Year
引っ越しTodo
No in-app purchases









