# Atlas 3D vs 101SUM

The clearest difference is update cadence: 101SUM at every 2 days against Atlas 3D's fortnightly. 101SUM also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Atlas 3D ships an update fortnightly, 101SUM every 2 days. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Atlas 3D | 101SUM |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Free | — |
| Size | 66 MB | 23 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Atlas Dedektor](https://appshunter.io/developer/1753343043) | [Bertan Balaban](https://appshunter.io/developer/1827216117) |

## What reviewers say

### Atlas 3D

[App page](https://appshunter.io/ios/app/atlas-3d/id6504693593)

This utility app allows users to scan and visualize their surroundings in real-time or underground using specialized devices. It offers directional guidance with a built-in compass and provides tools for analyzing and sharing scan data. Users can also update device software and access a manual within the application.

**Highlights:** Real-Time Scanning mode, Underground Scanning mode (3D), Pointer mode with alerts, Integrated compass, Device software updates, Scan data analysis and sharing, User Manual

**In-app purchases:** none


### 101SUM

[App page](https://appshunter.io/ios/app/101sum/id6755593613)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Atlas 3D free?

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

### Is 101SUM free?

101SUM is free to download, with no in-app purchases.

### Do Atlas 3D or 101SUM have ads?

Neither Atlas 3D nor 101SUM shows ads.

### Which is updated more often, Atlas 3D or 101SUM?

Atlas 3D ships an update fortnightly, and 101SUM every 2 days. Most recently, Atlas 3D was updated on October 1, 2026 and 101SUM on October 7, 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.*