# Cautionary vs Spark

The clearest difference is price: Spark at Free against Cautionary's $0.99. Cautionary's advantage is in-app purchases (none vs 10) and update cadence (every 3 days vs every 3 weeks). On ads and iOS requirement there is nothing between them.

Spark is free to download; Cautionary costs $0.99 up front. Spark sells 10 in-app purchases, starting at $2.99 per month. Cautionary asks for nothing beyond the download.

Cautionary ships an update every 3 days, Spark every 3 weeks. The most recent releases landed on October 8, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Cautionary | Spark |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.3 (8 ratings)](https://appshunter.io/ios/app/spark-ai-note-taker-summary/id6755416666/reviews)** |
| Number of ratings | — | **8** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 11 MB | 99 MB |
| Requires iOS | 16.4 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [辉章 何](https://appshunter.io/developer/1687027088) | [雅茹 杨](https://appshunter.io/developer/1849804597) |

## What reviewers say

### Cautionary

[App page](https://appshunter.io/ios/app/cautionary/id6451156147)

**Features:** Vision Pro support

**In-app purchases:** none


### Spark

[App page](https://appshunter.io/ios/app/spark-ai-note-taker-summary/id6755416666)

This AI-powered assistant helps you capture, transcribe, and summarize information from various sources. It offers tools for note-taking, studying, writing, and knowledge retrieval, transforming raw data into actionable insights.

**Highlights:** Real-time AI transcription with speaker labels, Instant smart summaries and outlines, Multimodal insights from images, PDFs, and links, AI writing and polishing tools, Flashcard and Q&A creation for studying, Smart Q&A for searching personal knowledge base, Instant translation and sharing of notes

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cloud Storage | $2.99 | per month |
| Cloud Storage | $4.99 | per month |
| Weekly Pro Membership | $6.99 | per 7 days |
| Membership | $6.99 | per 7 days |
| Cloud Storage | $6.99 | per month |
| Yearly Pro Membership | $39.99 | per year |
| 500Credits | $6.99 | one-time |
| 1000 Credits | $13.99 | one-time |
| 5000 Credits | $69.99 | one-time |
| 10000 Credits | $139.99 | one-time |


## Frequently asked questions

### Is Cautionary free?

Cautionary costs $0.99, with no in-app purchases.

### Is Spark free?

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

### Do Cautionary or Spark have ads?

Neither Cautionary nor Spark shows ads.

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

Cautionary ships an update every 3 days, and Spark every 3 weeks. Most recently, Cautionary was updated on October 8, 2026 and Spark on September 25, 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.*