# Nature's Notebook vs MARVLS AR for Physics 2

The clearest difference is update cadence: Nature's Notebook at every 3 weeks against MARVLS AR for Physics 2's every 4 months. Nature's Notebook also leads on device support (3 vs 1) and iOS requirement (12.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Nature's Notebook ships an update every 3 weeks, MARVLS AR for Physics 2 every 4 months. The most recent releases landed on July 7, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Nature's Notebook | MARVLS AR for Physics 2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (26 ratings)](https://appshunter.io/ios/app/natures-notebook/id1463430668/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Free | — |
| Size | 47 MB | 247 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [National Phenology Network](https://appshunter.io/developer/843843359) | [Michele McColgan](https://appshunter.io/developer/1532617986) |

## What reviewers say

### Nature's Notebook

[App page](https://appshunter.io/ios/app/natures-notebook/id1463430668)

Record observations of plant and animal life cycles, such as flowering and migration. Mark observation sites, create species lists, and log seasonal changes in nature.

**Highlights:** Record plant and animal life cycle events, Mark observation sites, Create species lists, Log seasonal observations, Citizen science program

**In-app purchases:** none


### MARVLS AR for Physics 2

[App page](https://appshunter.io/ios/app/marvls-ar-for-physics-2/id6630392503)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Nature's Notebook free?

Nature's Notebook is free to download, with no in-app purchases.

### Is MARVLS AR for Physics 2 free?

MARVLS AR for Physics 2 is free to download, with no in-app purchases.

### Do Nature's Notebook or MARVLS AR for Physics 2 have ads?

Neither Nature's Notebook nor MARVLS AR for Physics 2 shows ads.

### Which is updated more often, Nature's Notebook or MARVLS AR for Physics 2?

Nature's Notebook ships an update every 3 weeks, and MARVLS AR for Physics 2 every 4 months. Most recently, Nature's Notebook was updated on July 7, 2026 and MARVLS AR for Physics 2 on September 8, 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.*