# The Sidewinder Checklist vs Tech Dive

The clearest difference is price: Tech Dive at Free against The Sidewinder Checklist's $4.99. On rating, ratings volume, update cadence and ads there is nothing between them.

Tech Dive is free to download; The Sidewinder Checklist costs $4.99 up front. The Sidewinder Checklist sells 4 one-off in-app purchases and Tech Dive sells 2 in-app purchases, starting at $0.99 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 — 5.0 for The Sidewinder Checklist against 5.0 for Tech Dive. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

The Sidewinder Checklist ships an update every 6 weeks, Tech Dive every 4 weeks. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | The Sidewinder Checklist | Tech Dive |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/the-sidewinder-checklist/id6476092633/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/tech-dive/id6483004689/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 5 MB | 16 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Andrew Austin](https://appshunter.io/developer/1708589155) | [Skytip LLC](https://appshunter.io/developer/1569880600) |

## 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

**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 |


### Tech Dive

[App page](https://appshunter.io/ios/app/tech-dive/id6483004689)

This app helps plan scuba dives with various calculators for gas, depth, and air consumption. It supports metric and imperial units and offers advanced features through an in-app purchase.

**Highlights:** Dive planning calculators, Gas and air consumption calculations, Metric and imperial unit support, Depth and EAD calculations, Enriched Air-Nitrox mix calculation, Unit conversion tools

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $0.99 | per month |
| Plus Annual | $7.99 | per year |


## Frequently asked questions

### Is The Sidewinder Checklist free?

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

### Is Tech Dive free?

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

### Which has better reviews, The Sidewinder Checklist or Tech Dive?

The Sidewinder Checklist and Tech Dive are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do The Sidewinder Checklist or Tech Dive have ads?

Neither The Sidewinder Checklist nor Tech Dive shows ads.

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

The Sidewinder Checklist ships an update every 6 weeks, and Tech Dive every 4 weeks. Most recently, The Sidewinder Checklist was updated on October 13, 2026 and Tech Dive on October 11, 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.*