# V vs Slate

The clearest difference is price: Slate at Free against V's $48.99. Slate also leads on update cadence (weekly vs every 3 months). V's advantage is in-app purchases (none vs 2) and iOS requirement (17.6 vs 26.0). On ads and device support there is nothing between them.

Slate is free to download; V costs $48.99 up front. Slate sells 2 in-app purchases, starting at $29.99 per year. V asks for nothing beyond the download.

V ships an update every 3 months, Slate weekly. The most recent releases landed on October 22, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | V | Slate |
| --- | --- | --- |
| Price | $48.99 | **Free** |
| Rating | **[4.1 (7 ratings)](https://appshunter.io/ios/app/v-planner/id301978860/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 67.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Paid | — |
| Size | 3 MB | 16 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [HHS Software Corp.](https://appshunter.io/developer/301978863) | [Tools for Divers, LLC](https://appshunter.io/developer/1880150704) |

## What reviewers say

### V

[App page](https://appshunter.io/ios/app/v-planner/id301978860)

This app is a dive decompression calculator for technical scuba divers, implementing the VPM decompression model. It supports various gas mixes, planning methods for open circuit and rebreathers, and includes detailed dive planning tools and a gas blending utility.

**Highlights:** VPM-B and VPM-B/E decompression models, Support for nitrox and trimix gases, OC and CCR planning, Bailout planning for CCR, ppO2, END, and gas consumption details, Dive planning tools (best mix, MOD, END, EAD), Gas blending utility

**In-app purchases:** none


### Slate

[App page](https://appshunter.io/ios/app/slate-dive-logbook/id6759878835)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Slate Premium Annual | $29.99 | per year |
| Slate Premium Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is V free?

V costs $48.99, with no in-app purchases.

### Is Slate free?

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

### Do V or Slate have ads?

Neither V nor Slate shows ads.

### Which is updated more often, V or Slate?

V ships an update every 3 months, and Slate weekly. Most recently, V was updated on October 22, 2026 and Slate on October 7, 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.*