# OpenSourceInitiative vs Trajectory

The clearest difference is ads: OpenSourceInitiative at none against Trajectory's shown. OpenSourceInitiative also leads on device support (3 vs 1) and iOS requirement (11.0 vs 17.7.2). Trajectory's advantage is update cadence (fortnightly vs monthly). On price and in-app purchases there is nothing between them.

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

OpenSourceInitiative ships an update monthly, Trajectory fortnightly. The most recent releases landed on September 28, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | OpenSourceInitiative | Trajectory |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Size | 21 MB | 36 MB |
| Requires iOS | **11.0** | 17.7.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Meir Tsvi](https://appshunter.io/developer/1048958019) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### OpenSourceInitiative

[App page](https://appshunter.io/ios/app/opensourceinitiative/id1487779805)

**Features:** macOS Compatibility

**In-app purchases:** none


### Trajectory

[App page](https://appshunter.io/ios/app/trajectory-detection/id6511212764)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OpenSourceInitiative free?

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

### Is Trajectory free?

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

### Do OpenSourceInitiative or Trajectory have ads?

Trajectory shows ads; OpenSourceInitiative does not.

### Which is updated more often, OpenSourceInitiative or Trajectory?

OpenSourceInitiative ships an update monthly, and Trajectory fortnightly. Most recently, OpenSourceInitiative was updated on September 28, 2026 and Trajectory on October 11, 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.*