# Math Formulas vs 古籍选

The clearest difference is price: 古籍选 at Free against Math Formulas's $0.99. 古籍选 also leads on iOS requirement (15.6 vs 17.6). Math Formulas's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 4 months). On ads and device support there is nothing between them.

古籍选 is free to download; Math Formulas costs $0.99 up front. 古籍选 sells 1 one-off in-app purchase. Math Formulas asks for nothing beyond the download.

Math Formulas ships an update monthly, 古籍选 every 4 months. The most recent releases landed on September 28, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Math Formulas | 古籍选 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.1 (11 ratings)](https://appshunter.io/ios/app/math-formulas-ref-guide/id423545644/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 67.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | Free | — |
| Size | 18 MB | 66 MB |
| Requires iOS | 17.6 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Oddrobo Software AB](https://appshunter.io/developer/423545647) | [朝军 付](https://appshunter.io/developer/1618632441) |

## What reviewers say

### Math Formulas

[App page](https://appshunter.io/ios/app/math-formulas-ref-guide/id423545644)

Access over 100 high school level math formulas covering algebra, geometry, calculus, trigonometry, probability, and statistics. Includes examples for clarity and a search function to quickly find needed information. Ideal for students, teachers, and math enthusiasts.

**Highlights:** 100+ math formulas, Algebra, geometry, calculus, trig, Probability and statistics, Formulas with examples, Powerful search function, Favorite formulas

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 古籍选

[App page](https://appshunter.io/ios/app/id1619073696)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 激励 | $15.99 | one-time |


## Frequently asked questions

### Is Math Formulas free?

Math Formulas costs $0.99, with no in-app purchases.

### Is 古籍选 free?

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

### Do Math Formulas or 古籍选 have ads?

Neither Math Formulas nor 古籍选 shows ads.

### Which is updated more often, Math Formulas or 古籍选?

Math Formulas ships an update monthly, and 古籍选 every 4 months. Most recently, Math Formulas was updated on September 28, 2026 and 古籍选 on September 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*