# iRhino 3D vs Countdown

The clearest difference is in-app purchases: iRhino 3D at none against Countdown's 1. iRhino 3D also leads on update cadence (fortnightly vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Countdown sells 1 one-off in-app purchase. iRhino 3D asks for nothing beyond the download.

iRhino 3D ships an update fortnightly, Countdown monthly. Both last shipped on October 24, 2026.

## The numbers

| Metric | iRhino 3D | Countdown |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (81 ratings)](https://appshunter.io/ios/app/irhino-3d/id373666504/reviews)** | — |
| Number of ratings | **81** | — |
| Positive reviews | 55.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free | — |
| Size | 297 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Robert McNeel & Associates](https://appshunter.io/developer/373666507) | [MURATHAN ORAN](https://appshunter.io/developer/6783514032) |

## What reviewers say

### iRhino 3D

[App page](https://appshunter.io/ios/app/irhino-3d/id373666504)

View and present 3D models from Rhino 3D on your iPhone or iPad. Navigate models with intuitive touch gestures, load files from various sources, and visualize them in augmented reality. Includes a markup tool for annotations.

**Highlights:** 3D model viewing, Touch navigation (pan, zoom, orbit), Cloud storage integration, Augmented Reality (AR) mode, Integrated markup tool

**In-app purchases:** none

**What reviewers like**

- 👍 Smooth and intuitive 3D model manipulation
- 🚀 Fast performance with complex models
- 📱 Great for client presentations and demos
- 💼 Useful for on-the-go model viewing
- 🔄 Good Dropbox integration

**What reviewers complain about**

- 🐛 Frequent crashes on large files
- ❌ Limited to viewer functionality only
- 🚫 No native editing capabilities
- 📉 Poor LiDAR measurement accuracy
- 🔌 No iCloud Drive support

**Reported bugs**

- App crashes with large or complex files
- LiDAR measurements significantly inaccurate (off by ~2x)
- Cannot open local files without cloud storage
- Incompatibility with newer iOS versions
- App crashes during room scanning

**Requested features**

- Full native Rhino with Grasshopper support
- Real editing and modeling tools
- Wireframe and shaded view options
- Orthographic views (top, front, right)
- Texture and material support


### Countdown

[App page](https://appshunter.io/ios/app/countdown-warranty-tracker/id6792913210)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Countdown Unlock | $4.99 | one-time |


## Frequently asked questions

### Is iRhino 3D free?

iRhino 3D is free to download, with no in-app purchases.

### Is Countdown free?

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

### Do iRhino 3D or Countdown have ads?

Neither iRhino 3D nor Countdown shows ads.

### Which is updated more often, iRhino 3D or Countdown?

iRhino 3D ships an update fortnightly, and Countdown monthly. Most recently, iRhino 3D was updated on October 24, 2026 and Countdown on October 24, 2026.

---

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