# Spark vs PDF Editor & Reader

The clearest difference is monetization model: Spark at free with in-app purchases against PDF Editor & Reader's subscription. Spark also leads on ratings volume (7.5K vs 1) and device support (3 vs 1). PDF Editor & Reader's advantage is review sentiment (100% vs 75%) and rating (5.0 vs 4.8). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Spark sells 2 one-off in-app purchases and PDF Editor & Reader sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PDF Editor & Reader 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. Written reviews point the same way: 75% of Spark's written reviews are positive against 100% of PDF Editor & Reader's.

Spark ships an update every 5 weeks, PDF Editor & Reader every 3 weeks. The most recent releases landed on October 14, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Spark | PDF Editor & Reader |
| --- | --- | --- |
| 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/pdf-editor-and-reader-studio/id6794797860/reviews)** |
| Number of ratings | **7.5K** | 1 |
| Positive reviews | 74.8% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 10 MB | 21 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [E.L.K. Equities LLC](https://appshunter.io/developer/1775442602) | [Apptimize LLC](https://appshunter.io/developer/1643932210) |

## 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


### PDF Editor & Reader

[App page](https://appshunter.io/ios/app/pdf-editor-and-reader-studio/id6794797860)

Edit, read, and convert documents directly on your device. This app offers tools to scan, merge, split, sign, and protect your files. It also uses AI to summarize, translate, and answer questions about document text.

**Highlights:** Read and mark up PDFs, Scan documents with camera, Convert PDFs to Word, Word to PDF, Organize pages (merge, split, reorder), Sign, protect, and redact documents, AI-powered summarization and translation, Content search across documents

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly | $4.99 | per 7 days |
| PDF Pro Annual | $39.99 | per year |


## Frequently asked questions

### Is Spark free?

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

### Is PDF Editor & Reader free?

PDF Editor & Reader is free to download, with in-app purchases available.

### Which has better reviews, Spark or PDF Editor & Reader?

PDF Editor & Reader is rated higher. Spark averages 4.8 out of 5 from 7.5K ratings, while PDF Editor & Reader averages 5.0 from 1 ratings.

### Do Spark or PDF Editor & Reader have ads?

Neither Spark nor PDF Editor & Reader shows ads.

### Which is updated more often, Spark or PDF Editor & Reader?

Spark ships an update every 5 weeks, and PDF Editor & Reader every 3 weeks. Most recently, Spark was updated on October 14, 2026 and PDF Editor & Reader on September 30, 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.*