# Precision Dosing vs ReefATLAS PAR Estimator

The clearest difference is in-app purchases: Precision Dosing at none against ReefATLAS PAR Estimator's 1. ReefATLAS PAR Estimator's advantage is update cadence (daily vs every 44 months) and device support (3 vs 1). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. ReefATLAS PAR Estimator sells 1 in-app purchase, starting at $4.99 per month. Precision Dosing asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Precision Dosing against 5.0 for ReefATLAS PAR Estimator. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Precision Dosing ships an update every 44 months, ReefATLAS PAR Estimator daily. Both last shipped on October 1, 2026.

## The numbers

| Metric | Precision Dosing | ReefATLAS PAR Estimator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/precision-dosing/id1587344204/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/reefatlas-par-estimator/id6777574663/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 44 months | **Daily** |
| Monetization | **Free** | Subscription |
| Size | 5 MB | 27 MB |
| Requires iOS | 16.6 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [华 李](https://appshunter.io/developer/1051208751) | [JONATHAN ALBERT PITTMAN](https://appshunter.io/developer/6777574665) |

## What reviewers say

### Precision Dosing

[App page](https://appshunter.io/ios/app/precision-dosing/id1587344204)

Automate nutrient delivery for equipment with precise control. This application simplifies the process of adding nutrients, significantly reducing feeding complexity.

**Highlights:** Precision dosing control, Automated nutrient addition, Equipment integration, Reduced feeding difficulty, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


### ReefATLAS PAR Estimator

[App page](https://appshunter.io/ios/app/reefatlas-par-estimator/id6777574663)

This app helps reef aquarium enthusiasts estimate and visualize light distribution without a PAR meter. It allows users to input tank dimensions, lighting equipment, and water conditions to predict PAR levels and make informed decisions about coral placement and lighting setups. The tool offers interactive 3D visualizations and supports a wide range of popular reef lighting systems.

**Highlights:** Interactive 3D PAR heatmap visualization, Support for popular reef aquarium lighting systems, Multi-fixture light array setup, Fixture placement and angle controls, Spectrum and intensity adjustment tools, Custom tank dimension configuration, Surface agitation and lid modeling

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReefATLAS PAR Estimator Monthly | $4.99 | per month |


## Frequently asked questions

### Is Precision Dosing free?

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

### Is ReefATLAS PAR Estimator free?

ReefATLAS PAR Estimator is free to download, with in-app purchases available.

### Which has better reviews, Precision Dosing or ReefATLAS PAR Estimator?

Precision Dosing and ReefATLAS PAR Estimator are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Precision Dosing or ReefATLAS PAR Estimator have ads?

Neither Precision Dosing nor ReefATLAS PAR Estimator shows ads.

### Which is updated more often, Precision Dosing or ReefATLAS PAR Estimator?

Precision Dosing ships an update every 44 months, and ReefATLAS PAR Estimator daily. Most recently, Precision Dosing was updated on October 1, 2026 and ReefATLAS PAR Estimator on October 1, 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.*