# NAC vs Reef.Tools

The clearest difference is in-app purchases: Reef.Tools at none against NAC's 1. Reef.Tools also leads on update cadence (daily vs fortnightly). NAC's advantage is iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. NAC sells 1 in-app purchase, starting at $199.00 per year. Reef.Tools asks for nothing beyond the download.

NAC ships an update fortnightly, Reef.Tools daily. The most recent releases landed on September 14, 2026 and June 7, 2026 respectively.

## The numbers

| Metric | NAC | Reef.Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/reeftools/id6739948464/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Daily** |
| Monetization | — | Free |
| Size | 3 MB | 32 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Neubert Aero Corp](https://appshunter.io/developer/1785752651) | [Ivena LLC](https://appshunter.io/developer/1787597398) |

## What reviewers say

### NAC

[App page](https://appshunter.io/ios/app/nac-dfd-decelerometer/id6478895830)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| U.S. Region | $199.00 | per year |


### 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 NAC free?

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

### Is Reef.Tools free?

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

### Do NAC or Reef.Tools have ads?

Neither NAC nor Reef.Tools shows ads.

### Which is updated more often, NAC or Reef.Tools?

NAC ships an update fortnightly, and Reef.Tools daily. Most recently, NAC was updated on September 14, 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.*