# Spark vs CertPro

The clearest difference is iOS requirement: Spark at 15.6 against CertPro's 18.0. 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 CertPro sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Spark ships an update every 5 weeks, CertPro monthly. The most recent releases landed on October 14, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Spark | CertPro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (7.5K ratings)](https://appshunter.io/ios/app/spark-shift-calendar/id390915382/reviews)** | — |
| Number of ratings | **7.5K** | — |
| 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 | — |
| Size | 10 MB | 14 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [E.L.K. Equities LLC](https://appshunter.io/developer/1775442602) | [RAPHAEL MOMANYI](https://appshunter.io/developer/1884462424) |

## 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


### CertPro

[App page](https://appshunter.io/ios/app/certpro-license-tracker/id6761763832)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Certrack Pro Monthly | $4.99 | per month |
| Certrack Pro Annual | $34.99 | per year |


## Frequently asked questions

### Is Spark free?

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

### Is CertPro free?

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

### Do Spark or CertPro have ads?

Neither Spark nor CertPro shows ads.

### Which is updated more often, Spark or CertPro?

Spark ships an update every 5 weeks, and CertPro monthly. Most recently, Spark was updated on October 14, 2026 and CertPro on October 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.*