Patchy Scan 3D vs calc318
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Patchy Scan 3D
Create 3D models from your surroundings using augmented reality. Capture scans as multiple patches, export them as textured .Obj files, and view your creations in AR.
- Scan areas as multiple patches
- Export .Obj models with textures
- Examine scans in Augmented Reality
- Capture video of creations
- AR feature point tracking
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Patchy Scan 3D creates coarse 3D meshes from Augmented Reality tracking features. * Scan small or large areas as multiple patches. * Export the result as .Obj models with textures. * Examine your scans in Augmented Reality with or without live camera feed. * Capture video of your creations. Usage Instructions: 1. Move your phone until yellow feature points appear. 2. Press the scan button to create a mesh and texture. 3. Repeat. Performs best in good lighting and on newer devices. Visit the website for more information.
calc318
Instantly solve 175 ACI 318-19 equations with live computation and interactive charts. Understand equation behavior with sensitivity graphs and clear variable descriptions. Designed for engineers needing quick, accurate calculations and insights.
- 175 ACI 318-19 equations solved instantly
- Live computation with unit awareness
- Interactive sensitivity graphs
- Professionally formatted equations
- Complete variable descriptions
- Smart search functionality
- Recents tab for quick access
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Solve all 175 equations from ACI 318-19 Appendix C, instantly, in US Customary Units. Calc318 turns the equations from ACI 318-19 Appendix C into a live calculator. Pick an equation, enter your parameters, and get an answer the moment you type — beautifully rendered, with every variable clearly defined and unit-aware. No spreadsheets, no hand calcs. calc318 requires an auto-renewable subscription. Start your 7-day free trial — no charge until the trial ends, and you can cancel anytime. After the trial, your subscription continues at $12.99/year or $2.99/month. Manage or cancel anytime in Settings → Apple ID → Subscriptions. See more than just a number. Tap any input to open an interactive chart that shows exactly how your result responds as that parameter changes — with a draggable point and a family of curves for the other key variables, so you understand the behavior of the equation, not just one data point. FEATURES: - Live computation for all 175 ACI 318-19 equations, fully unit-aware. - Professionally formatted equations with LaTeX-quality rendering. - Interactive sensitivity graphs — drag a point and watch the result update in real time. - Compare curves across multiple parameter values to see trends at a glance. - Complete variable descriptions and units for every input. - Smart search by section number, chapter, keyword, or variable. - Recents tab to jump back to equations you use most. - Clean, intuitive interface designed for engineers. Whether you're checking a calculation, running a quick sensitivity study, or referencing design provisions, calc318 gets you the answer — and the insight behind it — in seconds. Privacy Policy: https://aiosciv.com/calc318/ Terms of Use (EULA): http://www.apple.com/legal/itunes/appstore/dev/stdeula
Screenshots
Verdict
The clearest difference is review sentiment: calc318 at 100% against Patchy Scan 3D's 33%. calc318 also leads on rating (5.0 vs 3.7). Patchy Scan 3D's advantage is monetization model (free with in-app purchases vs subscription) and update cadence (every 2 weeks vs every 3 months). 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. Patchy Scan 3D sells 1 one-off in-app purchase and calc318 sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
calc318 holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Patchy Scan 3D has 11 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 33% of Patchy Scan 3D's written reviews are positive against 100% of calc318's.
Patchy Scan 3D ships an update every 2 weeks, calc318 every 3 months. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.
| Parameter | Patchy Scan 3D | calc318 |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (11 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 33.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 11 — better | 1 |
| Update frequency | Every 2 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Subscription |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 2 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | niels jansson | ARTIFICIAL INTELLIGENCE OPTIMIZATION AND SOFTWARE AIOS LLC |
Customer experience
Patchy Scan 3D
calc318
In-app purchases
Patchy Scan 3D
- Exporting scans .Obj format$3.99
calc318
- calc318 Pro Monthly7 Days trial$2.991 Month
- calc318 Pro Yearly7 Days trial$12.991 Year
