Aeshna vs Part Mind
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Aeshna
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Aeshna is a professional CAD viewer and inspection tool for STEP and IGES files. Open, inspect, measure, and review 3D models directly on your device β no account required and no cloud upload. KEY FEATURES β’ STEP & IGES Support Open STEP, STP, IGES, and IGS files directly on your iPhone or iPad. β’ Assembly Tree Navigate assembly structures, inspect components, and control model visibility. β’ Section View Cut through models to inspect internal geometry and hidden details. β’ Exploded View Separate assembly components to better understand structure and relationships. β’ Precision B-Rep Measurement Measure distances, angles, areas, and volumes directly from B-Rep geometry. β’ PMI Support View dimensions, tolerances, datums, and other PMI information stored in STEP files. β’ Screenshot Markup Add drawings, shapes, and notes to model screenshots for review and sharing. β’ Multi-Format Export Export models to STEP, IGES, STL, OBJ, glTF, VRML, and other common formats. β’ Large Model Processing Use a paired Mac to process CAD models too large for your iPhone or iPad, then seamlessly continue viewing them on your device. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Part Mind
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This specialized app is for people who work with radio and electronic components in the real world: radio enthusiasts, engineers, equipment restorers, and collectors. It helps you organize parts stored in drawers, boxes, and bins, turning them into a precise personal archive with a clear structure and a history for each item. Here, each component is recorded as a separate physical object, not just an abstract entry. You create a part record, add a photo, specify key parameters, form factor, and type, and note the itemβs actual condition and whether it is suitable for use or restoration. When needed, you can capture its provenance: where the part came from, which device it was removed from, when it was removed, and how it ended up with you. This approach is especially useful when dismantling old equipment, sorting finds, preparing spares for repairs, or building a database for future projects. The app feels like a digital parts drawer, where every item has engineering value and context. You can quickly find what you need by name, parameters, or tags, and see where it is stored, how many units you have, and what condition they are in. This reduces clutter, saves time, and helps you avoid buying parts you already have on hand. To keep storage accurate, the app includes fields for location, quantity, and status, so your archive reflects reality, not just theory. You can track new additions, mark parts for refurbishment, separate working components from questionable ones, and view overall statistics by component type and condition. Over time, your archive becomes a reliable database for builds, repairs, and reuse, where you can rely on precise data rather than memory. If you are used to working with your hands and value order in your tools and spare parts, this app will help you organize your inventory and preserve knowledge about each component in a convenient digital format.
Screenshots
Verdict
The clearest difference is in-app purchases: Part Mind at none against Aeshna's 10. Part Mind also leads on iOS requirement (12.0 vs 18.6). On price, update cadence, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Aeshna sells 10 in-app purchases, starting at $4.99 per month. Part Mind asks for nothing beyond the download.
Aeshna ships an update every 6 weeks, Part Mind every 4 weeks. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.
| Parameter | Aeshna | Part Mind |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Every 4 weeks β better |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad, Mac β better | iPhone, iPod |
| Requires iOS | 18.6 | 12.0 β better |
| Further details β not scored | ||
| Size | 57 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Seize Times E-Commerce Co., Ltd. | Sean Kelly |
In-app purchases
Aeshna
- Viewra Models (Monthly)$4.991 Month
- Viewra BIMs (Monthly)$4.991 Month
- Viewra Complete (Monthly)$6.991 Month
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- Viewra Models (Yearly)$34.991 Year
- Viewra BIMs (Monthly)$34.991 Year
- Viewra Complete (Yearly)$49.991 Year
- Viewra Drawings (Lifetime)$39.99
- Viewra Models (Lifetime)$69.99
- Viewra BIMs (Lifetime)$69.99
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- Viewra Complete (Lifetime)$99.99
Part Mind
No in-app purchases









