# Causer vs OncallManager

The clearest difference is update cadence: OncallManager at every 5 days against Causer's fortnightly. Causer's advantage is iOS requirement (15.1 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.

Causer ships an update fortnightly, OncallManager every 5 days. The most recent releases landed on October 6, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Causer | OncallManager |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (84 ratings)](https://appshunter.io/ios/app/causer-get-connected/id1453746247/reviews)** | — |
| Number of ratings | **84** | — |
| Positive reviews | 31.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Free | — |
| Size | 64 MB | 16 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Galaxy Digital](https://appshunter.io/developer/1453746246) | [Hiroshi Matsueda](https://appshunter.io/developer/1656062331) |

## What reviewers say

### Causer

[App page](https://appshunter.io/ios/app/causer-get-connected/id1453746247)

Manage your volunteer schedule and engage with causes you care about. Track past and upcoming shifts, select new opportunities, and check in/out directly from your mobile device. Stay informed with push notifications and see the impact of your contributions.

**Highlights:** View past and upcoming volunteer shifts, Select new volunteer shifts, Push notifications for shifts, In-app check-in/check-out, Add hours manually, Calendar view of schedule, Track volunteer impact

**Features:** Vision Pro support

**In-app purchases:** none


### OncallManager

[App page](https://appshunter.io/ios/app/oncallmanager/id6739290146)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Causer free?

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

### Is OncallManager free?

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

### Do Causer or OncallManager have ads?

Neither Causer nor OncallManager shows ads.

### Which is updated more often, Causer or OncallManager?

Causer ships an update fortnightly, and OncallManager every 5 days. Most recently, Causer was updated on October 6, 2026 and OncallManager on October 10, 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.*