# The Sidewinder Checklist vs krakentools

The clearest difference is price: krakentools at Free against The Sidewinder Checklist's $4.99. krakentools also leads on update cadence (every 8 days vs every 6 weeks) and iOS requirement (15.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

krakentools is free to download; The Sidewinder Checklist costs $4.99 up front. The Sidewinder Checklist sells 4 one-off in-app purchases and krakentools sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

The Sidewinder Checklist ships an update every 6 weeks, krakentools every 8 days. The most recent releases landed on November 7, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | The Sidewinder Checklist | krakentools |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/the-sidewinder-checklist/id6476092633/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 8 days** |
| Monetization | Paid | **Free** |
| Size | 5 MB | 140 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Austin](https://appshunter.io/developer/1708589155) | [Arndt Kemper](https://appshunter.io/developer/1892010136) |

## What reviewers say

### The Sidewinder Checklist

[App page](https://appshunter.io/ios/app/the-sidewinder-checklist/id6476092633)

This app digitizes rebreather diving preparation with user-friendly checklists and countdown timers. It helps manage gear, track build history, and reduce paper waste for a more efficient and eco-friendly diving experience.

**Highlights:** Dedicated rebreather assembly checklists, Countdown timers for pre-breathes, Comprehensive task management for dive prep, Digital gear list with local data saving, Build history with mV values, Timely preparation notifications

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tiny Tip | $0.99 | one-time |
| Small Tip | $1.99 | one-time |
| Medium Tip | $4.99 | one-time |
| Large Tip | $9.99 | one-time |


### krakentools

[App page](https://appshunter.io/ios/app/krakentools-tecrec-tools/id6761906896)

This comprehensive dive toolbox offers planning and safety features for recreational, Nitrox, TEC, and CCR divers. It includes a digital logbook with Bluetooth connectivity for various dive computers, extensive import/export options, and tools for underwater media editing.

**Highlights:** Dive planner for various dive types, Decompression planner with Bühlmann ZH-L16C, Gas planning and analysis tools, Digital logbook with Bluetooth sync, Import/export dive data, Underwater photo/video color correction, CCR-specific dive tools

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KrakenTools Pro - Monthly | $3.99 | per month |
| KrakenTools Pro - Yearly | $44.99 | per year |
| KrakenTools Pro Version | $49.99 | one-time |


## Frequently asked questions

### Is The Sidewinder Checklist free?

The Sidewinder Checklist costs $4.99, and also offers in-app purchases.

### Is krakentools free?

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

### Do The Sidewinder Checklist or krakentools have ads?

Neither The Sidewinder Checklist nor krakentools shows ads.

### Which is updated more often, The Sidewinder Checklist or krakentools?

The Sidewinder Checklist ships an update every 6 weeks, and krakentools every 8 days. Most recently, The Sidewinder Checklist was updated on November 7, 2026 and krakentools on October 31, 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.*