# Spark vs Fire Shift Calendar

Spark and Fire Shift Calendar both sit at 4.8 stars, but that hides the real split: 75% of Spark's written reviews are positive against 0% of Fire Shift Calendar's. Spark also leads on ads (none vs shown) and ratings volume (7.5K vs 16). Fire Shift Calendar's advantage is update cadence (fortnightly vs every 5 weeks). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. Spark sells 2 one-off in-app purchases and Fire Shift Calendar sells 8 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.8 for Spark against 4.8 for Fire Shift Calendar. That said, the two scores are not equally well evidenced: Spark has 7.5K ratings behind it against 16, so its average is the more settled of the two. Written reviews are what separate them: 75% of Spark's written reviews are positive against 0% of Fire Shift Calendar's.

Spark ships an update every 5 weeks, Fire Shift Calendar fortnightly. The most recent releases landed on September 24, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | Spark | Fire Shift Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (7.5K ratings)](https://appshunter.io/ios/app/spark-shift-calendar/id390915382/reviews) | **[4.8 (16 ratings)](https://appshunter.io/ios/app/fire-shift-calendar/id1559443433/reviews)** |
| Number of ratings | **7.5K** | 16 |
| Positive reviews | **74.5% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 14 MB | 219 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [E.L.K. Equities LLC](https://appshunter.io/developer/1775442602) | [Ayodeji Shoola](https://appshunter.io/developer/1559443435) |

## 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

**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


### Fire Shift Calendar

[App page](https://appshunter.io/ios/app/fire-shift-calendar/id1559443433)

This app simplifies complex work schedules for shift workers. It offers custom shift patterns, automatic time tracking for benefits and overtime, and cross-device synchronization. Designed for professionals in emergency services, healthcare, and other industries with non-traditional hours.

**Highlights:** Custom shift pattern creation, Repeating rotation application, Color-coded shifts, Vacation, sick, and overtime tracking, Automatic accrual calculations, Cross-device synchronization, Calendar integration

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| All Access | $2.99 | per month |
| Monthly | $3.99 | per month |
| All Access | $3.99 | per month |
| Yearly | $19.99 | per year |
| All Access | $29.99 | per year |
| Yearly | $39.99 | per year |
| All Access | $39.99 | per year |


## Frequently asked questions

### Is Spark free?

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

### Is Fire Shift Calendar free?

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

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

Fire Shift Calendar is rated higher. Spark averages 4.8 out of 5 from 7.5K ratings, while Fire Shift Calendar averages 4.8 from 16 ratings.

### Do Spark or Fire Shift Calendar have ads?

Fire Shift Calendar shows ads; Spark does not.

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

Spark ships an update every 5 weeks, and Fire Shift Calendar fortnightly. Most recently, Spark was updated on September 24, 2026 and Fire Shift Calendar on June 3, 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.*