# Structural Formulas Study vs Studyfly

The clearest difference is update cadence: Studyfly at every 3 days against Structural Formulas Study's every 5 weeks. Studyfly also leads on iOS requirement (14.0.0 vs 18.4). On price, ads, in-app purchases and device support there is nothing between them.

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

Structural Formulas Study ships an update every 5 weeks, Studyfly every 3 days. The most recent releases landed on September 20, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Structural Formulas Study | Studyfly |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 days** |
| Size | 5 MB | 44 MB |
| Requires iOS | 18.4 | **14.0.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jun Yamabe](https://appshunter.io/developer/1732682049) | [Studyfly Pty Ltd](https://appshunter.io/developer/1896282912) |

## What reviewers say

### Structural Formulas Study

[App page](https://appshunter.io/ios/app/structural-formulas-study/id6752260162)

**Features:** macOS Compatibility

**In-app purchases:** none


### Studyfly

[App page](https://appshunter.io/ios/app/studyfly/id6766381158)

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

**In-app purchases:** none


## Frequently asked questions

### Is Structural Formulas Study free?

Structural Formulas Study is free to download, with no in-app purchases.

### Is Studyfly free?

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

### Do Structural Formulas Study or Studyfly have ads?

Neither Structural Formulas Study nor Studyfly shows ads.

### Which is updated more often, Structural Formulas Study or Studyfly?

Structural Formulas Study ships an update every 5 weeks, and Studyfly every 3 days. Most recently, Structural Formulas Study was updated on September 20, 2026 and Studyfly on October 7, 2026.

---

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