# BitBitCS vs Dogl Precalculus

The clearest difference is update cadence: BitBitCS at every 8 days against Dogl Precalculus's every 6 months. BitBitCS also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. BitBitCS sells 1 in-app purchase, starting at $4.99 per month and Dogl Precalculus sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

BitBitCS ships an update every 8 days, Dogl Precalculus every 6 months. The most recent releases landed on May 16, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | BitBitCS | Dogl Precalculus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (17 ratings)](https://appshunter.io/ios/app/dogl-precalculus/id6670212064/reviews)** |
| Number of ratings | — | **17** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 6 months |
| Monetization | — | Free with in-app purchases |
| Size | 33 MB | 36 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LIN SUN](https://appshunter.io/developer/1764594272) | [Dogl](https://appshunter.io/developer/1554140183) |

## What reviewers say

### BitBitCS

[App page](https://appshunter.io/ios/app/bitbitcs/id6661013090)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per month |


### Dogl Precalculus

[App page](https://appshunter.io/ios/app/dogl-precalculus/id6670212064)

Master Precalculus with this app designed by university professors. It offers bite-sized problem-solving, personalized learning paths, and visual hints to guide you. Start with 100 free problems and unlock more weekly, with optional upgrades for unlimited access.

**Highlights:** Bite-sized problem-solving, Personalized learning paths, Visual hints for guidance, 100 free starter problems, Weekly free problem unlocks, Ad-free experience, AP Precalculus curriculum compatible

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Plan - 4 months | $0.99 | one-time |
| Unlimited Plan - 1 year | $1.99 | one-time |


## Frequently asked questions

### Is BitBitCS free?

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

### Is Dogl Precalculus free?

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

### Do BitBitCS or Dogl Precalculus have ads?

Neither BitBitCS nor Dogl Precalculus shows ads.

### Which is updated more often, BitBitCS or Dogl Precalculus?

BitBitCS ships an update every 8 days, and Dogl Precalculus every 6 months. Most recently, BitBitCS was updated on May 16, 2026 and Dogl Precalculus on September 12, 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.*