# MOD Ration Formulation Tool vs Reef Diary Aquarium Management

The clearest difference is rating: MOD Ration Formulation Tool at 5.0 against Reef Diary Aquarium Management's 1.0. MOD Ration Formulation Tool also leads on in-app purchases (none vs 4) and iOS requirement (12.0 vs 15.1). On price, ratings volume, update cadence 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. MOD Ration Formulation Tool asks for nothing beyond the download.

MOD Ration Formulation Tool holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

MOD Ration Formulation Tool ships an update every 3 weeks, Reef Diary Aquarium Management monthly. The most recent releases landed on July 6, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | MOD Ration Formulation Tool | Reef Diary Aquarium Management |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mod-ration-formulation-tool/id1553098803/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/reef-diary-aquarium-management/id6746352304/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | **Free** | Freemium |
| Size | 38 MB | 58 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Gnanavel Subramaniam](https://appshunter.io/developer/1553098805) | [Christian Buchholz](https://appshunter.io/developer/1816370032) |

## What reviewers say

### MOD Ration Formulation Tool

[App page](https://appshunter.io/ios/app/mod-ration-formulation-tool/id1553098803)

This utility app helps dairy farmers in Sri Lanka create balanced and cost-effective feed rations for their animals. It utilizes readily available feed resources to ensure optimal nutrition.

**Highlights:** Formulate nutrient-adequate diets, Calculate least-cost rations, Utilize common feed resources, Support for dairy animals, Designed for Sri Lankan farmers

**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 MOD Ration Formulation Tool free?

MOD Ration Formulation Tool 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.

### Which has better reviews, MOD Ration Formulation Tool or Reef Diary Aquarium Management?

MOD Ration Formulation Tool is rated higher. MOD Ration Formulation Tool averages 5.0 out of 5 from 1 ratings, while Reef Diary Aquarium Management averages 1.0 from 1 ratings.

### Do MOD Ration Formulation Tool or Reef Diary Aquarium Management have ads?

Neither MOD Ration Formulation Tool nor Reef Diary Aquarium Management shows ads.

### Which is updated more often, MOD Ration Formulation Tool or Reef Diary Aquarium Management?

MOD Ration Formulation Tool ships an update every 3 weeks, and Reef Diary Aquarium Management monthly. Most recently, MOD Ration Formulation Tool was updated on July 6, 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.*