# MD118 vs Reef Diary Aquarium Management

The clearest difference is in-app purchases: MD118 at none against Reef Diary Aquarium Management's 4. MD118 also leads on update cadence (weekly vs monthly) and iOS requirement (13.0 vs 15.1). Reef Diary Aquarium Management's advantage is device support (4 vs 2). On price and ads there is nothing between them.

Both are free to download. Reef Diary Aquarium Management sells 4 in-app purchases, starting at $2.99 per month. MD118 asks for nothing beyond the download.

MD118 ships an update weekly, Reef Diary Aquarium Management monthly. The most recent releases landed on October 17, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | MD118 | Reef Diary Aquarium Management |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/reef-diary-aquarium-management/id6746352304/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Monthly |
| Monetization | — | Freemium |
| Size | 1 MB | 58 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Iroshini Dissanayake](https://appshunter.io/developer/1771382882) | [Christian Buchholz](https://appshunter.io/developer/1816370032) |

## What reviewers say

### MD118

[App page](https://appshunter.io/ios/app/md118/id6733230024)

**Features:** macOS Compatibility

**In-app purchases:** none


### Reef Diary Aquarium Management

[App page](https://appshunter.io/ios/app/reef-diary-aquarium-management/id6746352304)

Manage your reef or freshwater aquarium with this comprehensive tool. Track water parameters, schedule maintenance, and monitor your aquatic life and equipment. Works offline to keep your ecosystem healthy and thriving.

**Highlights:** Smart parameter tracking for reef and freshwater, Visual trend charts for water parameters, Multiple tank support, Equipment and livestock inventory, Maintenance task scheduler with reminders, Offline functionality

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reef Diary - Monthly | $2.99 | per month |
| Reef Diary - Yearly | $24.99 | per year |
| Enterprise Monthly Subscription | $89.99 | per month |
| ReefDiary Yearly Enterprise | $699.00 | per year |


## Frequently asked questions

### Is MD118 free?

MD118 is free to download, with no in-app purchases.

### Is Reef Diary Aquarium Management free?

Reef Diary Aquarium Management is free to download, with in-app purchases available.

### Do MD118 or Reef Diary Aquarium Management have ads?

Neither MD118 nor Reef Diary Aquarium Management shows ads.

### Which is updated more often, MD118 or Reef Diary Aquarium Management?

MD118 ships an update weekly, and Reef Diary Aquarium Management monthly. Most recently, MD118 was updated on October 17, 2026 and Reef Diary Aquarium Management on October 4, 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.*