STEP Viewer vs Struggle List
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
STEP Viewer
View and interact with 3D CAD files directly on your mobile device. Measure dimensions, rotate, zoom, and save models in a common format without needing desktop software.
- Open STEP files from file manager
- 3D model measurement tools
- Six fixed views
- Pinch to zoom, pan, and rotate
- Save as GLB
- Progress indicator for large files
- Multilingual support
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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.
Struggle List
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Most people write down what they achieve. Struggle List is different. It helps you record the problems, habits, and challenges you truly want to overcome. Instead of forgetting or avoiding them, you keep them visible until they’re resolved. Every struggle is a step toward becoming a better version of yourself.
Screenshots
Verdict
The clearest difference is update cadence: STEP Viewer at every 5 days against Struggle List's every 3 weeks. STEP Viewer also leads on iOS requirement (13.0 vs 17.0). 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. Neither carries in-app purchases, so what you see is what you pay.
STEP Viewer ships an update every 5 days, Struggle List every 3 weeks. The most recent releases landed on October 28, 2026 and October 22, 2026 respectively.
| Parameter | STEP Viewer | Struggle List |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 days — better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 61 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Smart Cube Labs Co., Ltd. | 明辉 陈 |
In-app purchases
STEP Viewer
No in-app purchases
Struggle List
No in-app purchases
Questions
Is STEP Viewer free?
Is Struggle List free?
Do STEP Viewer or Struggle List have ads?
Which is updated more often, STEP Viewer or Struggle List?
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