# Simple Duty Roster vs On

The clearest difference is update cadence: Simple Duty Roster at every 8 days against On's every 3 weeks. Simple Duty Roster also leads on iOS requirement (12.0 vs 17.6). 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.

Simple Duty Roster ships an update every 8 days, On every 3 weeks. The most recent releases landed on October 30, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Simple Duty Roster | On |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 71.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 weeks |
| Monetization | — | Free |
| Size | 33 MB | 25 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Tatsumi Oikawa](https://appshunter.io/developer/1635976900) | [RYOTA UEMATSU](https://appshunter.io/developer/1829255016) |

## What reviewers say

### Simple Duty Roster

[App page](https://appshunter.io/ios/app/simple-duty-roster/id6747189273)

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

**In-app purchases:** none


### On

[App page](https://appshunter.io/ios/app/on-call-shift-schedule-maker/id6756843278)

This app automates the creation of fair and efficient duty rosters for teams. It collects requests, generates schedules respecting various constraints, and manages swaps post-finalization. Supports multiple currencies and holiday detection for several countries.

**Highlights:** Collects team member requests, Automated schedule generation, Ensures fairness in assignments, Manages post-finalization swaps, Supports multiple currencies, Export schedules to PDF, Sends duty reminders

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

**In-app purchases:** none


## Frequently asked questions

### Is Simple Duty Roster free?

Simple Duty Roster is free to download, with no in-app purchases.

### Is On free?

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

### Do Simple Duty Roster or On have ads?

Neither Simple Duty Roster nor On shows ads.

### Which is updated more often, Simple Duty Roster or On?

Simple Duty Roster ships an update every 8 days, and On every 3 weeks. Most recently, Simple Duty Roster was updated on October 30, 2026 and On on November 2, 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.*