# MongoDB Events vs J9 Builder

The clearest difference is update cadence: J9 Builder at every 2 months against MongoDB Events's every 4 months. J9 Builder also leads on iOS requirement (13.0 vs 17.0). 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.

MongoDB Events ships an update every 4 months, J9 Builder every 2 months. The most recent releases landed on October 1, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | MongoDB Events | J9 Builder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 75 MB | 22 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [MongoDB, Inc.](https://appshunter.io/developer/1009365759) | [Rahul Gandhi](https://appshunter.io/developer/1856576240) |

## What reviewers say

### MongoDB Events

[App page](https://appshunter.io/ios/app/mongodb-events/id6677058593)

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

**In-app purchases:** none


### J9 Builder

[App page](https://appshunter.io/ios/app/j9-builder/id6755823057)

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

**In-app purchases:** none


## Frequently asked questions

### Is MongoDB Events free?

MongoDB Events is free to download, with no in-app purchases.

### Is J9 Builder free?

J9 Builder is free to download, with no in-app purchases.

### Do MongoDB Events or J9 Builder have ads?

Neither MongoDB Events nor J9 Builder shows ads.

### Which is updated more often, MongoDB Events or J9 Builder?

MongoDB Events ships an update every 4 months, and J9 Builder every 2 months. Most recently, MongoDB Events was updated on October 1, 2026 and J9 Builder on October 11, 2026.

---

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