# C21Events vs C21 One21

C21Events and C21 One21 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | C21Events | C21 One21 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Size | 60 MB | 69 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [C21screen](https://appshunter.io/developer/462810211) | [Century 21 Real Estate, LLC](https://appshunter.io/developer/371112830) |

## What reviewers say

### C21Events

[App page](https://appshunter.io/ios/app/c21events/id6550917165)

**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 C21Events free?

C21Events 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 C21Events or C21 One21 have ads?

Neither C21Events nor C21 One21 shows ads.

### Which is updated more often, C21Events or C21 One21?

C21Events ships an update every 3 months, and C21 One21 every 3 months. Most recently, C21Events was updated on October 24, 2026 and C21 One21 on October 25, 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.*