# Shift Day Work Calendar vs Service Harness

The clearest difference is in-app purchases: Service Harness at none against Shift Day Work Calendar's 10. Service Harness also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.3). Shift Day Work Calendar's advantage is update cadence (every 4 days vs every 3 months). On price and device support there is nothing between them.

Both are free to download. Shift Day Work Calendar sells 8 in-app purchases, starting at $4.99 per month. Service Harness asks for nothing beyond the download.

Shift Day Work Calendar ships an update every 4 days, Service Harness every 3 months. The most recent releases landed on November 12, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Shift Day Work Calendar | Service Harness |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (14K ratings)](https://appshunter.io/ios/app/shift-day-work-calendar-spoke/id1016565262/reviews)** | — |
| Number of ratings | **14K** | — |
| Positive reviews | 85.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 243 MB | 38 MB |
| Requires iOS | 17.3 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [PIXO Incorporation](https://appshunter.io/developer/541568418) | [PATRICK A MANFRA 3RD](https://appshunter.io/developer/1889359383) |

## What reviewers say

### Shift Day Work Calendar

[App page](https://appshunter.io/ios/app/shift-day-work-calendar-spoke/id1016565262)

Easily track your work shifts with a clear calendar view. Add, remove, and manage your schedule with simple taps, color-coding, and reminders. Share your availability with others and sync across devices.

**Highlights:** Color-coded shift tracking, Intuitive rota interface, Add multiple memos, Shift widget for quick view, Easy schedule sharing, iCloud sync, Automatic calendar filling

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription Trial | $4.99 | per month |
| Month-Subscription | $4.99 | per month |
| Monthly Subscription Trial | $4.99 | per month |
| Yearly Subscription Special Offer | $24.99 | per year |
| Yearly Pro Subscription Trial | $34.99 | per year |
| Year-Subscription | $34.99 | per year |
| Pro Upgrade Now | $2.99 | one-time |
| Pro Upgrade | $79.99 | one-time |

**What reviewers like**

- 🚀 Simple and efficient
- 👍 Easy to use and navigate
- 🎨 Helpful color coding
- 🗓️ Convenient for shift scheduling
- ⏰ Shift reminders

**What reviewers complain about**

- 🔒 Paid upgrade required for full functionality
- 🔀 Issues with syncing across devices
- 🗓️ Limited view of calendar
- 📝 Memos not prominently displayed

**Reported bugs**

- App crashing or closing unexpectedly
- Shifts not displaying correctly
- Issues with paid version not working after device change

**Requested features**

- Ability to add more than 2 shifts per day
- Integration with other calendar apps
- Customizable color options
- Recurring memo/event feature
- Week view option


### Service Harness

[App page](https://appshunter.io/ios/app/service-harness/id6762049963)

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

**In-app purchases:** none


## Frequently asked questions

### Is Shift Day Work Calendar free?

Shift Day Work Calendar is free to download, with in-app purchases available.

### Is Service Harness free?

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

### Do Shift Day Work Calendar or Service Harness have ads?

Shift Day Work Calendar shows ads; Service Harness does not.

### Which is updated more often, Shift Day Work Calendar or Service Harness?

Shift Day Work Calendar ships an update every 4 days, and Service Harness every 3 months. Most recently, Shift Day Work Calendar was updated on November 12, 2026 and Service Harness on October 28, 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.*