Causer vs OncallManager
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Causer
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.
- 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
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Causer is for volunteers to handle their volunteer schedules while engaging with the causes and organizations they care about! Your volunteer program is using Get Connected volunteer software, giving you access to your volunteer profile right here from the Causer app. Log in or create your account to connect with your volunteer organization. From your volunteer dashboard, youíll be able to view all of your past and upcoming volunteer shifts, or select new volunteer shifts! Receive push notifications when your volunteer shift is approaching and when you arrive on-site ready to check-in. You can check in directly from the app when you begin volunteering to ensure your program is able to collect your volunteer hours - data that helps make a bigger difference! The app will also remind you when it is time to check out and stop your volunteer clock. From your volunteer profile you can: ~ Add hours without checking in ~ Select new volunteer shifts ~ Manage your volunteer schedule in calendar view ~ Check-in/check-out of volunteer shifts ~ And, see the impact you're making!
OncallManager
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Being on call means you can’t leave home, but don’t you feel like others are surprisingly not at home? It’s a hassle to ask your manager to switch shifts, and you’re not even sure who’s at home... OncallManager solves these problems for you.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Causer | OncallManager |
|---|---|---|
| Price | Free | Free |
| Rating | 2.5 (84 ratings) — better | — |
| Positive reviews | 31.8% of reviews | — |
| Number of ratings | 84 — better | — |
| Update frequency | Fortnightly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 64 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Galaxy Digital | Hiroshi Matsueda |
In-app purchases
Causer
No in-app purchases
OncallManager
No in-app purchases









