# Atmospheric Model vs PopsicleBridge

The clearest difference is in-app purchases: Atmospheric Model at none against PopsicleBridge's 1. Atmospheric Model also leads on iOS requirement (12.0 vs 17.6). PopsicleBridge's advantage is update cadence (every 2 months vs every 36 months). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. PopsicleBridge sells 1 one-off in-app purchase. Atmospheric Model asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Atmospheric Model against 5.0 for PopsicleBridge. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Atmospheric Model ships an update every 36 months, PopsicleBridge every 2 months. The most recent releases landed on October 10, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Atmospheric Model | PopsicleBridge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/atmospheric-model/id1299565883/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/popsiclebridge/id6758178670/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 36 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 12 MB | 22 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Richard Loda](https://appshunter.io/developer/1291794366) | [Justin Neuman](https://appshunter.io/developer/1859103444) |

## What reviewers say

### Atmospheric Model

[App page](https://appshunter.io/ios/app/atmospheric-model/id1299565883)

Explore planetary atmospheres with a radiative transfer model. Calculate emission temperatures and flux densities, then modify parameters like albedo and solar constant to simulate atmospheric changes and their effects on climate.

**Highlights:** Radiative transfer model for planetary atmospheres, Calculates emission temperature and flux densities, Adjustable parameters: albedo, distance from sun, extinction coefficients, Supports 9 solar system planets or custom planets, Generates flux diagrams of incoming and outgoing radiation, Saves and compares two model run results, Exports data to CSV for spreadsheet analysis

**Features:** macOS Compatibility

**In-app purchases:** none


### PopsicleBridge

[App page](https://appshunter.io/ios/app/popsiclebridge/id6758178670)

This app allows students and hobbyists to digitally design and test popsicle-stick bridges before building them. It simulates real-world competition constraints and provides detailed failure analysis to aid learning and iteration.

**Highlights:** Digital bridge prototyping, Real-world design constraints, Load testing and failure analysis, Iterative design practice, Educational focus on engineering principles, Free and Pro versions available

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PopsicleBridge Pro | $4.99 | one-time |


## Frequently asked questions

### Is Atmospheric Model free?

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

### Is PopsicleBridge free?

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

### Which has better reviews, Atmospheric Model or PopsicleBridge?

Atmospheric Model and PopsicleBridge are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do Atmospheric Model or PopsicleBridge have ads?

Neither Atmospheric Model nor PopsicleBridge shows ads.

### Which is updated more often, Atmospheric Model or PopsicleBridge?

Atmospheric Model ships an update every 36 months, and PopsicleBridge every 2 months. Most recently, Atmospheric Model was updated on October 10, 2026 and PopsicleBridge on October 2, 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.*