# Spark vs Shift Calendar

The clearest difference is ratings volume: Spark at 7.5K against Shift Calendar's 1. Shift Calendar's advantage is rating (5.0 vs 4.8) and iOS requirement (12.0 vs 15.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Spark sells 2 one-off in-app purchases and Shift Calendar sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Shift Calendar holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Spark has 7.5K ratings behind it against 1, so its average is the more settled of the two.

Spark ships an update every 5 weeks, Shift Calendar monthly. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Spark | Shift Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (7.5K ratings)](https://appshunter.io/ios/app/spark-shift-calendar/id390915382/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/shift-calendar-auto-schedule/id6476062772/reviews)** |
| Number of ratings | **7.5K** | 1 |
| Positive reviews | 74.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 10 MB | 35 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [E.L.K. Equities LLC](https://appshunter.io/developer/1775442602) | [晨 房](https://appshunter.io/developer/1683285100) |

## What reviewers say

### Spark

[App page](https://appshunter.io/ios/app/spark-shift-calendar/id390915382)

This app simplifies shift work for professionals like first responders and healthcare workers. It offers full customization, secure cloud syncing, and streamlined shift trading. Plan your life and stay organized with instant visual cues and reliable support.

**Highlights:** Full shift customization, Secure cloud sync, Streamlined shift trades, Instant visual cues, Comprehensive shift coverage, User-friendly interface

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription Renewal | $0.99 | one-time |
| Initial Annual Subscription | $5.99 | one-time |

**What reviewers like**

- 🚀 Excellent calendar app
- 👍 Easy to use and set up
- 🔒 Secure and reliable
- 💡 Customizable and feature-rich
- 👍 Great for shift work and emergency services

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- 💰 Subscription model and pricing issues
- 🔧 Needs more frequent updates
- 🔧 Compatibility issues with newer devices
- 🔧 Lack of certain features (e.g., widgets, dark mode)

**Reported bugs**

- Login and authentication problems
- Data loss and sync issues after updates
- Unreliable performance on some devices

**Requested features**

- Ability to sync with more calendar services
- More customization options
- Improved user interface and design
- Ability to view past schedules and events


### Shift Calendar

[App page](https://appshunter.io/ios/app/shift-calendar-auto-schedule/id6476062772)

This calendar app is designed for shift workers, offering automatic calculation of time off for work cycles. It also includes additional tools specifically for managing shift-related schedules.

**Highlights:** Shift worker focus, Automatic time off calculation, Work cycle scheduling, Shift-related tools

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shift Calendar Premium | $9.99 | one-time |


## Frequently asked questions

### Is Spark free?

Spark is free to download, with in-app purchases available.

### Is Shift Calendar free?

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

### Which has better reviews, Spark or Shift Calendar?

Shift Calendar is rated higher. Spark averages 4.8 out of 5 from 7.5K ratings, while Shift Calendar averages 5.0 from 1 ratings.

### Do Spark or Shift Calendar have ads?

Neither Spark nor Shift Calendar shows ads.

### Which is updated more often, Spark or Shift Calendar?

Spark ships an update every 5 weeks, and Shift Calendar monthly. Most recently, Spark was updated on November 1, 2026 and Shift Calendar on October 24, 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.*