# OPEN EX vs Gantt Chart

The clearest difference is in-app purchases: OPEN EX at none against Gantt Chart's 3. OPEN EX also leads on iOS requirement (15.0 vs 18.0). Gantt Chart's advantage is update cadence (every 2 days vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Gantt Chart sells 3 one-off in-app purchases. OPEN EX asks for nothing beyond the download.

OPEN EX ships an update every 5 weeks, Gantt Chart every 2 days. The most recent releases landed on November 8, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | OPEN EX | Gantt Chart |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 days** |
| Size | 44 MB | 4 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [RIK Corporation](https://appshunter.io/developer/507134227) | [YOSHIYUKI UEMATSU](https://appshunter.io/developer/1895723706) |

## What reviewers say

### OPEN EX

[App page](https://appshunter.io/ios/app/open-ex/id6473357021)

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

**In-app purchases:** none


### Gantt Chart

[App page](https://appshunter.io/ios/app/gantt-chart-project-timeline/id6816038134)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Pro | $2.99 | one-time |
| Premium | $2.99 | one-time |
| Pro | $4.99 | one-time |


## Frequently asked questions

### Is OPEN EX free?

OPEN EX is free to download, with no in-app purchases.

### Is Gantt Chart free?

Gantt Chart is free to download, with in-app purchases available.

### Do OPEN EX or Gantt Chart have ads?

Neither OPEN EX nor Gantt Chart shows ads.

### Which is updated more often, OPEN EX or Gantt Chart?

OPEN EX ships an update every 5 weeks, and Gantt Chart every 2 days. Most recently, OPEN EX was updated on November 8, 2026 and Gantt Chart on November 13, 2026.

---

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