# reData Mobile vs C21 One21

The clearest difference is update cadence: reData Mobile at every 2 weeks against C21 One21's every 3 months. 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.

reData Mobile ships an update every 2 weeks, C21 One21 every 3 months. Both last shipped on October 31, 2026.

## The numbers

| Metric | reData Mobile | C21 One21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/redata-mobile/id6758808705/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Free | — |
| Size | 60 MB | 69 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [REAL ESTATE DATA TECHNOLOGIES, LLC](https://appshunter.io/developer/6791658063) | [Century 21 Real Estate, LLC](https://appshunter.io/developer/371112830) |

## What reviewers say

### reData Mobile

[App page](https://appshunter.io/ios/app/redata-mobile/id6758808705)

Access real-time MLS data, property listings, and essential search tools on your mobile device. Stay informed about active, pending, sold, and historical listings with comprehensive details and photos. Ideal for home buyers, sellers, and real estate professionals.

**Highlights:** Real-time MLS listing data access, Search active, pending, sold, and historical listings, Comprehensive property details and photos, Save searches and view recent activity, GPS-based nearby listing locator, Property information for showings

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

**In-app purchases:** none


### C21 One21

[App page](https://appshunter.io/ios/app/c21-one21/id6760855095)

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

**In-app purchases:** none


## Frequently asked questions

### Is reData Mobile free?

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

### Is C21 One21 free?

C21 One21 is free to download, with no in-app purchases.

### Do reData Mobile or C21 One21 have ads?

Neither reData Mobile nor C21 One21 shows ads.

### Which is updated more often, reData Mobile or C21 One21?

reData Mobile ships an update every 2 weeks, and C21 One21 every 3 months. Most recently, reData Mobile was updated on October 31, 2026 and C21 One21 on October 31, 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.*