ZumenX vs JWW見れる君
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ZumenX
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ZumenX – The Drawing & Document Viewer Built for Construction Sites Stop carrying rolled-up paper drawings around the jobsite. ZumenX lets you open the drawing files you use every day on your phone or tablet, measure right on the spot, mark them up, and share them with your team. ■ Open jobsite drawings as they are Supports PDF, AutoCAD DWG and DXF, Jw_cad JWW, SVG, and scanned images (PNG, JPG, WEBP, HEIC). BIM IFC files can be viewed both as floor plans and as 3D models. ■ Measure lengths and areas with a tap Calibrate the scale simply by tracing two points on the drawing and entering the real distance. After that, just tap to measure. - Length: Tap the points you want to measure, one after another, to see each segment's length and the total. The crosshair automatically snaps to corners, intersections, and line endpoints, so you don't need pinpoint accuracy. - Area: Just tap inside the space you want to measure. The app automatically finds the enclosed region, fills it, and shows its area. Tap again to switch to the area including inner holes. Get room and zone areas without picking every vertex. - Angle and slope: Shows the angle between two lines, along with the slope as a ratio and as a percentage. Choose from mm, cm, m, inches, or feet. The calibrated scale is saved per drawing, so it's ready the next time you open it. ■ Markups and notes Draw lines, arrows, shapes, and text directly on the drawing. Great for sharing issues or reviewing the plan before the morning meeting. Markups are saved without altering the original drawing. ■ Photo pins show exactly where each photo was taken Drop a pin on the drawing and attach site photos to it. Add an assignee, due date, and notes, and never waste time figuring out where a photo was taken. You can also create PDF corrective action reports and photo logs from the pin list. ■ Overlay drawings on a map Overlay your drawing on a map to check the site location and its surroundings. ■ Pricing that lets you invite anyone Pricing is based only on the number of active sites. There is no limit on how many people you invite, so tradespeople and subcontractors can join at no extra cost. ■ Learn with short videos Short in-app videos show you how to use each feature. ■ Word and Excel documents in the same app Drawings aren't the only thing you bring to the site. View specifications, quantity sheets, and meeting minutes as they are: Word, Excel, PowerPoint, TIFF, text, and CSV files open right in the app. Even design documents hundreds of pages long are comfortable to read page by page. ■ Share the latest version with your team Organize drawings by project and simply invite members to share them. When a drawing is replaced, everyone gets the latest version, and you can overlay it on the previous version to see exactly what changed. Supports separate permissions for editors and view-only members. ■ Works without a signal Drawings you've opened once are saved on your device, so you can view them even where there's no signal, such as in the mountains, in tunnels, or deep inside buildings. Recommended for - Site supervisors and construction managers - Anyone who often gives instructions to tradespeople or shares drawings with subcontractors - Teams tired of asking "Which drawing is the latest?" - Anyone who wants to stop carrying paper drawings and cut printing costs Try it free. Start by opening a drawing you already have. The app is available in English and Japanese. Terms of Use (EULA): https://zumenx.net/legal/en/terms.html Privacy Policy: https://zumenx.net/legal/en/privacy.html
JWW見れる君
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現場に、図面ビューアと物差しを1台で。 JWW見れる君は、Jw_cad の図面(JWW)を iPad・iPhone でそのまま開き、 その場で寸法を測れる現場向けアプリです。事務所のPCに戻らなくても、 足場の上でも、型枠の前でも、指先で測って確認できます。 ■ 現場でできること ・JWW図面をそのまま開いて表示(レイヤーの表示切替に対応) ・2点タップで実寸を計測。累進計測で連続した寸法も一気に確認 ・複線・寸法の書き込みに対応。測った内容を図面へ残せる ・JWW形式/PDFで保存して共有 ■ 型枠・墨出しの実務に 図面を見ながら「ここからここまで何ミリか」をその場で出せるので、 型枠の割付確認、墨出し前の寸法拾い、取り合いのチェックに役立ちます。 ■ DXF表示実績 書き出したDXFは、Autodesk のオンラインビューアでの表示確認済みです。 現場で書き込んだ内容を、事務所側のCAD環境へ渡す用途にも使えます。 ■ 端末内で完結・安心 図面やPDFは端末の中だけで処理します。外部サーバーへ送信しません。 オフラインでも動作します。 ■ 料金 ・見る・測るは何枚でも無料です(閲覧・レイヤ・計測・寸法や複線のプレビュー)。 ・書いた寸法・複線を保存・DXF書き出し・印刷できるのは、3図面まで無料です (同じ図面とその保存ファイルは何度でも)。 ・Pro(買い切り・1回のお支払い)で、4図面目以降も無制限になります。 買い切りなら、そのあとの追加のお支払いはありません。 ■ 月額プラン(自動更新サブスクリプション) ・月額プラン: 自動更新サブスクリプション(料金は購入画面に表示されます) ・期間: 1か月ごとに自動更新 ・現在の期間が終わる24時間前までに解約しない限り、自動的に更新され、料金は Apple アカウントに請求されます ・解約: 「設定」→ いちばん上のお名前 →「サブスクリプション」から、いつでも解約できます ・利用規約: Apple 標準EULA(https://www.apple.com/legal/internet-services/itunes/dev/stdeula/) ・プライバシーポリシー: https://yamaapps.dev/privacy (買い切り・月額なし もあり、どちらかをお持ちなら Pro の全機能をご利用いただけます)
Screenshots
Verdict
The clearest difference is update cadence: JWW見れる君 at every 4 days against ZumenX's every 10 days. 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. ZumenX sells 7 in-app purchases, starting at $11.99 per month and JWW見れる君 sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
ZumenX ships an update every 10 days, JWW見れる君 every 4 days. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.
| Parameter | ZumenX | JWW見れる君 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 days | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 91 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Booth | Akira Yamatani |
In-app purchases
ZumenX
- ソロ 月額 / 編集者1人$11.991 Month
- スモール 月額 / 編集者5人$49.991 Month
- チーム 月額 / 編集者10人$99.991 Month
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- ソロ 年額 / 編集者1人$119.991 Year
- ビジネス 月額 / 編集者20人$199.991 Month
- スモール 年額 / 編集者5人$499.991 Year
- チーム 年額 / 編集者10人$999.991 Year
JWW見れる君
- JWW見れる君 Pro(月額)$2.991 Month
- Pro(買い切り)$29.99








