3DXReaderDS 3Dビューア vs STEP Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
3DXReaderDS 3Dビューア
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株式会社シーセット製3Dビューア「3DTascalX」と「3DTascalX/Light」で保存した オリジナル拡張子ファイル(*.3dxds)をタブレットやスマートフォンで閲覧するための専用ビューアアプリになります。 以前より無料のビューアアプリとしてご好評頂いているWindows向けアプリ「3DXReader」の 機能を厳選、さらにタブレットやスマートフォンの利点を活かし、オリジナルの機能を追加したビューアアプリです。 お客様のご要望の声を詰め込んで「3DXReaderDS」として誕生しました。 回転、拡大、縮小といった基本的な機能に加え、テキストやチェックマークの追加、フリーハンドでの 自由記入など、紙の図面のように描き込む機能を追加。 タッチペンを使えばまるで鉛筆で紙に書き込むようにご使用頂けます。 ※ご使用には「3DTascalX」もしくは「3DTascalX/Light」にて専用の有料オプションのご契約が 必要となります。 詳細なお問い合わせ、ご要望は(株)シーセットまで。 https://www.3dtascal.com/ TEL 03-6261-0389
STEP Viewer
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STEP Viewer opens STEP (.step, .stp) CAD files in 3D on your phone. No desktop CAD software needed. Everything is free. There are no in-app purchases. Credits only skip the ad; without credits you can still open every file after watching a short ad. Key features * Open .step and .stp files straight from your file manager - just tap the file * Measure your model: a bounding box with all three side lengths, in mm or m * Six fixed views (front, right, back, left, top, bottom), plus pinch to zoom, pan and rotate * Save the converted model as GLB whenever you need it * Large files show the estimated time and memory before conversion starts, and progress while it runs * If a file cannot be opened, the app tells you why instead of failing silently * Available in 12 languages, following your device settings Supported formats * Input: .stp, .step (STEP AP203, AP214) * Output: .glb (glTF Binary) How to use 1. Tap a .step file in your file manager, or open the app and tap the folder icon 2. Wait for the conversion - large files show progress and an estimate 3. Drag to rotate, pinch to zoom, tap the view button to switch sides License This app uses Open CASCADE Technology (LGPL-2.1). https://www.opencascade.com For questions or bug reports, please contact us by email.
Screenshots
Verdict
The clearest difference is iOS requirement: STEP Viewer at 13.0 against 3DXReaderDS 3Dビューア's 15.6. On price, update cadence, ads and in-app purchases 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.
3DXReaderDS 3Dビューア ships an update every 4 days, STEP Viewer every 5 days. The most recent releases landed on September 30, 2026 and October 4, 2026 respectively.
| Parameter | 3DXReaderDS 3Dビューア | STEP Viewer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days — better | Every 5 days |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 47 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | 株式会社シーセット (C’set Co.,Ltd.) | Smart Cube Labs Co., Ltd. |
In-app purchases
3DXReaderDS 3Dビューア
No in-app purchases
STEP Viewer
No in-app purchases
Questions
Is 3DXReaderDS 3Dビューア free?
Is STEP Viewer free?
Do 3DXReaderDS 3Dビューア or STEP Viewer have ads?
Which is updated more often, 3DXReaderDS 3Dビューア or STEP Viewer?
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