# Biocalendar App vs Slangnet

The clearest difference is in-app purchases: Biocalendar App at none against Slangnet's 2. Slangnet's advantage is update cadence (fortnightly vs every 2 months) and iOS requirement (13.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Slangnet sells 2 in-app purchases, starting at $1.99 per month. Biocalendar App asks for nothing beyond the download.

Biocalendar App ships an update every 2 months, Slangnet fortnightly. The most recent releases landed on September 17, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Biocalendar App | Slangnet |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 21 MB | 49 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Harvey Makishima](https://appshunter.io/developer/1770018547) | [Creativity Center, LLC](https://appshunter.io/developer/1792928242) |

## What reviewers say

### Biocalendar App

[App page](https://appshunter.io/ios/app/biocalendar-app/id6711344227)

**Features:** macOS Compatibility

**In-app purchases:** none


### Slangnet

[App page](https://appshunter.io/ios/app/slangnet/id6741078428)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium User Monthly | $1.99 | per month |
| Premium User Yearly | $19.99 | per year |


## Frequently asked questions

### Is Biocalendar App free?

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

### Is Slangnet free?

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

### Do Biocalendar App or Slangnet have ads?

Neither Biocalendar App nor Slangnet shows ads.

### Which is updated more often, Biocalendar App or Slangnet?

Biocalendar App ships an update every 2 months, and Slangnet fortnightly. Most recently, Biocalendar App was updated on September 17, 2026 and Slangnet on September 9, 2026.

---

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