Comparison

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.

Head to head
About

3DXReaderDS 3Dビューア

Features
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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

About

STEP Viewer

Features
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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

3DXReaderDS 3Dビューア4 screens
STEP Viewer4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 5 level
3DXReaderDS 3Dビューア versus STEP Viewer: the parameters behind the verdict, then further details
Parameter3DXReaderDS 3DビューアSTEP Viewer
PriceFreeFree
Update frequencyEvery 4 days — betterEvery 5 days
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.613.0 — better
Further details — not scored
Size47 MB61 MB
Age rating4+4+
Developer株式会社シーセット (C’set Co.,Ltd.)Smart Cube Labs Co., Ltd.

In-app purchases

None

3DXReaderDS 3Dビューア

No in-app purchases

None

STEP Viewer

No in-app purchases

Questions

Is 3DXReaderDS 3Dビューア free?
3DXReaderDS 3Dビューア is free to download, with no in-app purchases.
Is STEP Viewer free?
STEP Viewer is free to download, with no in-app purchases.
Do 3DXReaderDS 3Dビューア or STEP Viewer have ads?
Neither 3DXReaderDS 3Dビューア nor STEP Viewer shows ads.
Which is updated more often, 3DXReaderDS 3Dビューア or STEP Viewer?
3DXReaderDS 3Dビューア ships an update every 4 days, and STEP Viewer every 5 days. Most recently, 3DXReaderDS 3Dビューア was updated on September 30, 2026 and STEP Viewer on October 4, 2026.

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