# 100cm Ruler vs 3D Snap

The clearest difference is ads: 100cm Ruler at none against 3D Snap's shown. 100cm Ruler also leads on review sentiment (45% vs 32%) and iOS requirement (12.0 vs 18.0). 3D Snap's advantage is ratings volume (408 vs 1) and update cadence (every 3 weeks vs every 3 months). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. 100cm Ruler sells 1 one-off in-app purchase and 3D Snap sells 15 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.0 for 100cm Ruler against 4.0 for 3D Snap. That said, the two scores are not equally well evidenced: 3D Snap has 408 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 45% of 100cm Ruler's written reviews are positive against 32% of 3D Snap's.

100cm Ruler ships an update every 3 months, 3D Snap every 3 weeks. The most recent releases landed on June 11, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | 100cm Ruler | 3D Snap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/100cm-ruler/id982815744/reviews) | [4.0 (408 ratings)](https://appshunter.io/ios/app/3d-snap-lidar-room-scanner/id6477467417/reviews) |
| Number of ratings | 1 | **408** |
| Positive reviews | **45.1% of reviews** | 32.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | — | **#152** |
| Size | 62 MB | 170 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ZOOMO, Inc.](https://appshunter.io/developer/490112424) | [BPMobile](https://appshunter.io/developer/1085442365) |

## What reviewers say

### 100cm Ruler

[App page](https://appshunter.io/ios/app/100cm-ruler/id982815744)

This app provides a digital ruler for measuring the length and diameter of small objects directly on your device. It features a millimeter scale and allows for easy sliding to measure.

**Highlights:** Digital ruler functionality, Millimeter scale, Diameter measurement, Screen sliding for measurement, Ad removal option

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ADS | $1.99 | one-time |


### 3D Snap

[App page](https://appshunter.io/ios/app/3d-snap-lidar-room-scanner/id6477467417)

**Currently charting:** #152 Top Grossing · Productivity (US App Store)

Transform your iPhone into a powerful floor plan creator and 3D scanner using LiDAR technology. Quickly capture room layouts, measure spaces, and visualize objects in 3D for renovation, interior design, or moving.

**Highlights:** LiDAR-powered room scanning, Instant floor plan generation, 3D object scanning from photos, Accurate AR measurements, Export floor plans and 3D models, Measure walls, areas, and furniture

**Features:** Vision Pro support

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per 7 days |
| Premium | $5.99 | per 7 days |
| Premium | $5.99 | per 7 days |
| Premium | $6.99 | per 7 days |
| Premium | $6.99 | per 7 days |
| Premium | $7.99 | per 7 days |
| Premium | $8.99 | per 7 days |
| Premium | $8.99 | per 7 days |
| Premium | $9.99 | per 7 days |
| Premium | $9.99 | per 7 days |
| Premium | $19.99 | per year |
| Premium | $29.99 | per year |
| Premium | $39.99 | per year |
| Premium | $149.99 | per year |
| Premium | $149.99 | per year |

**What reviewers like**

- 🚀 Accurate measurements
- 👍 Easy to use
- 🤩 Helpful for home improvement projects
- 💯 Stunningly realistic 3D models

**What reviewers complain about**

- 🐛 Crashes frequently
- 🤯 Confusing navigation and UI
- 💰 Expensive subscription model
- 🚫 Incompatible with older devices
- 🤔 Inaccurate room scans and measurements

**Reported bugs**

- Walls appear crooked in 3D models
- Furniture obstructs accurate scanning
- Difficulty cancelling subscription

**Requested features**

- Ability to edit scanned rooms
- Option to manually input measurements
- Export functionality for floor plans
- Multi-room support


## Frequently asked questions

### Is 100cm Ruler free?

100cm Ruler is free to download, with in-app purchases available.

### Is 3D Snap free?

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

### Which has better reviews, 100cm Ruler or 3D Snap?

100cm Ruler and 3D Snap are both rated 4.0 out of 5 on the App Store, from 1 and 408 ratings respectively.

### Do 100cm Ruler or 3D Snap have ads?

3D Snap shows ads; 100cm Ruler does not.

### Which is updated more often, 100cm Ruler or 3D Snap?

100cm Ruler ships an update every 3 months, and 3D Snap every 3 weeks. Most recently, 100cm Ruler was updated on June 11, 2026 and 3D Snap on September 26, 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.*