# Work Shift Calendar (Shifter) vs Builder M

The clearest difference is in-app purchases: Builder M at none against Work Shift Calendar (Shifter)'s 11. Builder M also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Work Shift Calendar (Shifter) sells 11 one-off in-app purchases. Builder M asks for nothing beyond the download.

Work Shift Calendar (Shifter) ships an update every 6 weeks, Builder M monthly. The most recent releases landed on October 14, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Work Shift Calendar (Shifter) | Builder M |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (2.4K ratings)](https://appshunter.io/ios/app/work-shift-calendar-shifter/id1523513035/reviews)** | — |
| Number of ratings | **2.4K** | — |
| Positive reviews | 91.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 47 MB |
| Requires iOS | **13.0** | 13.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Luis Alberto Reyes Halaby](https://appshunter.io/developer/1523513037) | [Builder](https://appshunter.io/developer/1449591980) |

## What reviewers say

### Work Shift Calendar (Shifter)

[App page](https://appshunter.io/ios/app/work-shift-calendar-shifter/id1523513035)

Organize your work schedule, track income, and manage appointments with customizable shifts and reminders. Features include daily, weekly, and monthly views, income statistics, and calendar export. Stay on top of your day with this comprehensive tool for shift workers.

**Highlights:** Customizable shift creation, Income and overtime tracking, Shift-specific alarms, Daily notes with reminders, Desktop widgets, Monthly and annual calendar views, Calendar export and import

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donation | $0.99 | one-time |
| Donation | $1.99 | one-time |
| Donation | $2.99 | one-time |
| Donation | $3.99 | one-time |
| PRO Version | $4.99 | one-time |
| Donation | $4.99 | one-time |
| Donation | $5.99 | one-time |
| Donation | $6.99 | one-time |
| Donation | $7.99 | one-time |
| Donation | $8.99 | one-time |
| Donation | $9.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Convenient for shift workers
- 💰 Helps track income and pay
- 🎨 Customizable colors and layout
- 📅 Useful for planning schedules and appointments

**What reviewers complain about**

- 🐛 Issues with syncing across devices
- 🔍 Difficulty finding tutorial or instructions
- 🔧 Limited ability to manage more than 2 shifts per day
- 🔌 Widget no longer available after iOS 18 update

**Reported bugs**

- App crashes after recent update
- Alarms not working properly on some devices
- Calendar not displaying correct dates/days

**Requested features**

- Add ability to share schedules with others
- Improve syncing and backup capabilities
- Introduce a widget option for iOS devices
- Allow more than 2 shifts to be added per day


### Builder M

[App page](https://appshunter.io/ios/app/builder-m/id1584655729)

**In-app purchases:** none


## Frequently asked questions

### Is Work Shift Calendar (Shifter) free?

Work Shift Calendar (Shifter) is free to download, with in-app purchases available.

### Is Builder M free?

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

### Do Work Shift Calendar (Shifter) or Builder M have ads?

Work Shift Calendar (Shifter) shows ads; Builder M does not.

### Which is updated more often, Work Shift Calendar (Shifter) or Builder M?

Work Shift Calendar (Shifter) ships an update every 6 weeks, and Builder M monthly. Most recently, Work Shift Calendar (Shifter) was updated on October 14, 2026 and Builder M on September 12, 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.*