# Arithmetic Worksheet vs Nature Almanac AI

The clearest difference is in-app purchases: Arithmetic Worksheet at none against Nature Almanac AI's 3. Arithmetic Worksheet also leads on iOS requirement (12.0 vs 15.0). Nature Almanac AI's advantage is update cadence (every 2 weeks vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Nature Almanac AI sells 3 in-app purchases, starting at $4.99 per month. Arithmetic Worksheet asks for nothing beyond the download.

Arithmetic Worksheet ships an update every 4 months, Nature Almanac AI every 2 weeks. The most recent releases landed on November 4, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Arithmetic Worksheet | Nature Almanac AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/nature-almanac-ai/id6796149184/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | — | Freemium |
| Size | 87 MB | 68 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yan Xu](https://appshunter.io/developer/1503643654) | [帅 王](https://appshunter.io/developer/6796144228) |

## What reviewers say

### Arithmetic Worksheet

[App page](https://appshunter.io/ios/app/arithmetic-worksheet/id6473706462)

**Features:** macOS Compatibility

**In-app purchases:** none


### Nature Almanac AI

[App page](https://appshunter.io/ios/app/nature-almanac-ai/id6796149184)

Identify plants, insects, and animals using AI and build a personal nature journal. Learn scientific details, nature stories, and English vocabulary with each discovery. Offers privacy-focused on-device storage and optional cloud sync.

**Highlights:** AI species identification, Personal nature almanac, Scientific details and facts, English vocabulary learning, Privacy-focused on-device storage, Optional cloud sync

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $4.99 | per month |
| Premium Annual | $24.99 | per year |
| Premium Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Arithmetic Worksheet free?

Arithmetic Worksheet is free to download, with no in-app purchases.

### Is Nature Almanac AI free?

Nature Almanac AI is free to download, with in-app purchases available.

### Do Arithmetic Worksheet or Nature Almanac AI have ads?

Neither Arithmetic Worksheet nor Nature Almanac AI shows ads.

### Which is updated more often, Arithmetic Worksheet or Nature Almanac AI?

Arithmetic Worksheet ships an update every 4 months, and Nature Almanac AI every 2 weeks. Most recently, Arithmetic Worksheet was updated on November 4, 2026 and Nature Almanac AI on November 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.*