# Dive Planner Calculator vs Reef.Tools

The clearest difference is review sentiment: Dive Planner Calculator at 67% against Reef.Tools's 0%. Dive Planner Calculator also leads on rating (3.3 vs 3.0) and iOS requirement (11.0 vs 15.1). Reef.Tools's advantage is price (Free vs $8.99) and update cadence (daily vs every 7 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Reef.Tools is free to download; Dive Planner Calculator costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Dive Planner Calculator holds the better App Store score, 3.3 against 3.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 67% of Dive Planner Calculator's written reviews are positive against 0% of Reef.Tools's.

Dive Planner Calculator ships an update every 7 months, Reef.Tools daily. The most recent releases landed on September 2, 2026 and June 7, 2026 respectively.

## The numbers

| Metric | Dive Planner Calculator | Reef.Tools |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | **[3.3 (3 ratings)](https://appshunter.io/ios/app/dive-planner-calculator/id6739454581/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/reeftools/id6739948464/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Daily** |
| Monetization | Paid | **Free** |
| Size | 10 MB | 32 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SAGA Virtual Tecnologia Ltda](https://appshunter.io/developer/1455930511) | [Ivena LLC](https://appshunter.io/developer/1787597398) |

## What reviewers say

### Dive Planner Calculator

[App page](https://appshunter.io/ios/app/dive-planner-calculator/id6739454581)

This app simplifies recreational dive planning by calculating essential dive parameters for up to three consecutive dives. It provides automatic calculations for residual nitrogen, safe ascent times, and includes a visual dive graph for easy review. Designed for both new and experienced divers, it ensures adherence to safety standards for stress-free underwater exploration.

**Highlights:** Plan up to three consecutive dives, Automatic calculation of dive parameters, Surface interval tracking, Visual dive graph, Adherence to safety guidelines, On-the-go convenience

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

**In-app purchases:** none


### Reef.Tools

[App page](https://appshunter.io/ios/app/reeftools/id6739948464)

This app simplifies reef tank maintenance with science-backed tools. It offers a precision dosing calculator for over 30 elements, customizable schedules, and insights into water chemistry. Compare your tank's parameters to natural ocean values.

**Highlights:** Precision dosing calculator for 30+ elements, Customizable dosing schedules, Reef chemistry insights, Support for multiple brands and custom targets, Comparison to natural ocean parameters

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dive Planner Calculator free?

Dive Planner Calculator costs $8.99, with no in-app purchases.

### Is Reef.Tools free?

Reef.Tools is free to download, with no in-app purchases.

### Which has better reviews, Dive Planner Calculator or Reef.Tools?

Dive Planner Calculator is rated higher. Dive Planner Calculator averages 3.3 out of 5 from 3 ratings, while Reef.Tools averages 3.0 from 2 ratings.

### Do Dive Planner Calculator or Reef.Tools have ads?

Neither Dive Planner Calculator nor Reef.Tools shows ads.

### Which is updated more often, Dive Planner Calculator or Reef.Tools?

Dive Planner Calculator ships an update every 7 months, and Reef.Tools daily. Most recently, Dive Planner Calculator was updated on September 2, 2026 and Reef.Tools on June 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.*