# Patchy Scan 3D vs calc318

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.

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.

## The numbers

| Metric | Patchy Scan 3D | calc318 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (11 ratings)](https://appshunter.io/ios/app/patchy-scan-3d-ar/id1436709455/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calc318/id6763030413/reviews)** |
| Number of ratings | **11** | 1 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 2 MB | 19 MB |
| Requires iOS | **16.0** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [niels jansson](https://appshunter.io/developer/1092867441) | [ARTIFICIAL INTELLIGENCE OPTIMIZATION AND SOFTWARE AIOS LLC](https://appshunter.io/developer/1835191566) |

## What reviewers say

### Patchy Scan 3D

[App page](https://appshunter.io/ios/app/patchy-scan-3d-ar/id1436709455)

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.

**Highlights:** Scan areas as multiple patches, Export .Obj models with textures, Examine scans in Augmented Reality, Capture video of creations, AR feature point tracking

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Exporting scans .Obj format | $3.99 | one-time |


### calc318

[App page](https://appshunter.io/ios/app/calc318/id6763030413)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| calc318 Pro Monthly | $2.99 | per month |
| calc318 Pro Yearly | $12.99 | per year |


## Frequently asked questions

### Is Patchy Scan 3D free?

Patchy Scan 3D is free to download, with in-app purchases available.

### Is calc318 free?

calc318 is free to download, with in-app purchases available.

### Which has better reviews, Patchy Scan 3D or calc318?

calc318 is rated higher. Patchy Scan 3D averages 3.7 out of 5 from 11 ratings, while calc318 averages 5.0 from 1 ratings.

### Do Patchy Scan 3D or calc318 have ads?

Neither Patchy Scan 3D nor calc318 shows ads.

### Which is updated more often, Patchy Scan 3D or calc318?

Patchy Scan 3D ships an update every 2 weeks, and calc318 every 3 months. Most recently, Patchy Scan 3D was updated on September 30, 2026 and calc318 on October 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*