# Cumulus vs Abstractor

The clearest difference is in-app purchases: Cumulus at none against Abstractor's 3. Cumulus also leads on iOS requirement (15.0 vs 18.0). Abstractor's advantage is update cadence (every 5 days vs every 3 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Abstractor sells 3 in-app purchases, starting at $0.99 per month. Cumulus asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Cumulus against 5.0 for Abstractor. Both are backed by a comparable volume of ratings — 3 and 7 respectively.

Cumulus ships an update every 3 months, Abstractor every 5 days. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Cumulus | Abstractor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/cumulus-project-understanding/id1503410868/reviews) | [5.0 (7 ratings)](https://appshunter.io/ios/app/abstractor/id1588227281/reviews) |
| Number of ratings | 3 | **7** |
| Positive reviews | — | 71.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 46 MB | 4 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Arrowstreet, Inc.](https://appshunter.io/developer/1384580121) | [superdiagonal](https://appshunter.io/developer/1588227283) |

## What reviewers say

### Cumulus

[App page](https://appshunter.io/ios/app/cumulus-project-understanding/id1503410868)

Visualize and interact with 3D architectural models on your mobile device. Explore designs, view documents, and create sketches to share with your project team. Augmented reality mode allows for close-up inspection of detailed models.

**Highlights:** View, rotate, and explore 3D models, Save and share 3D views, Access project documents and plans, View project renderings, Create and share sketches, Augmented reality mode for detailed inspection, Manage project team members and permissions

**In-app purchases:** none


### Abstractor

[App page](https://appshunter.io/ios/app/abstractor/id1588227281)

This drawing app uses generative magic and dynamic flow brushes to create unique, animated artwork. Explore infinite possibilities with brushes that respond to your gestures, imported images, and algorithmic patterns.

**Highlights:** Generative flow brushes, Image-driven velocity maps, Algorithmic particle behavior, Color shifting based on stroke, Layer support, Color source layers

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access · 1 Month | $0.99 | per month |
| Premium · 1 Year | $9.99 | per year |
| All-Access | $9.99 | one-time |


## Frequently asked questions

### Is Cumulus free?

Cumulus is free to download, with no in-app purchases.

### Is Abstractor free?

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

### Which has better reviews, Cumulus or Abstractor?

Cumulus and Abstractor are both rated 5.0 out of 5 on the App Store, from 3 and 7 ratings respectively.

### Do Cumulus or Abstractor have ads?

Neither Cumulus nor Abstractor shows ads.

### Which is updated more often, Cumulus or Abstractor?

Cumulus ships an update every 3 months, and Abstractor every 5 days. Most recently, Cumulus was updated on October 19, 2026 and Abstractor on October 24, 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.*