# Calculus Gacha！ vs Firstra

Calculus Gacha！ and Firstra are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Calculus Gacha！ sells 3 one-off in-app purchases and Firstra sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on October 11, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Calculus Gacha！ | Firstra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/firstra-study-tracker/id6773582786/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | Every 3 days |
| Monetization | — | Freemium |
| Size | 83 MB | 53 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shunsuke Nakamura](https://appshunter.io/developer/1828229182) | [HAIGANG MENG](https://appshunter.io/developer/6773582788) |

## What reviewers say

### Calculus Gacha！

[App page](https://appshunter.io/ios/app/calculus-gacha/id6753078774)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 不定方程式ガチャ利用オプション | $0.99 | one-time |
| AI Tutor Plus(500) | $2.99 | one-time |
| 履歴管理機能オプション | $2.99 | one-time |


### Firstra

[App page](https://appshunter.io/ios/app/firstra-study-tracker/id6773582786)

Organize your learning with custom tasks and goals. Build consistent study habits using a dedicated timer and daily log. Personalize your experience with themes and colors.

**Highlights:** Create custom study books and tasks, Set daily learning goals, Track study progress over time, Log daily study time and visualize streaks, Dedicated study timer, Personalize with themes and colors

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Plan (Monthly) | $1.99 | per month |
| Pro Plan (Yearly) | $11.99 | per year |
| Pro Plan (Lifetime) | $39.99 | one-time |


## Frequently asked questions

### Is Calculus Gacha！ free?

Calculus Gacha！ is free to download, with in-app purchases available.

### Is Firstra free?

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

### Do Calculus Gacha！ or Firstra have ads?

Neither Calculus Gacha！ nor Firstra shows ads.

### Which is updated more often, Calculus Gacha！ or Firstra?

Calculus Gacha！ ships an update every 3 days, and Firstra every 3 days. Most recently, Calculus Gacha！ was updated on October 11, 2026 and Firstra on September 25, 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.*