# ReefATLAS PAR Estimator vs Tankquil

The clearest difference is price: ReefATLAS PAR Estimator at Free against Tankquil's $0.99. ReefATLAS PAR Estimator also leads on device support (3 vs 1) and iOS requirement (14.0 vs 17.0). Tankquil's advantage is in-app purchases (none vs 1). On ads there is nothing between them.

ReefATLAS PAR Estimator is free to download; Tankquil costs $0.99 up front. ReefATLAS PAR Estimator sells 1 in-app purchase, starting at $4.99 per month. Tankquil asks for nothing beyond the download.

## The numbers

| Metric | ReefATLAS PAR Estimator | Tankquil |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/reefatlas-par-estimator/id6777574663/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Daily | — |
| Monetization | Subscription | — |
| Size | 27 MB | 57 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [JONATHAN ALBERT PITTMAN](https://appshunter.io/developer/6777574665) | [Avrian Zajac](https://appshunter.io/developer/6803979491) |

## What reviewers say

### 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 |


### Tankquil

[App page](https://appshunter.io/ios/app/tankquil/id6803979488)

**In-app purchases:** none


## Frequently asked questions

### Is ReefATLAS PAR Estimator free?

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

### Is Tankquil free?

Tankquil costs $0.99, with no in-app purchases.

### Do ReefATLAS PAR Estimator or Tankquil have ads?

Neither ReefATLAS PAR Estimator nor Tankquil shows ads.

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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.*