# Surecheck Calendar vs NerdCycle

The clearest difference is in-app purchases: Surecheck Calendar at none against NerdCycle's 2. Surecheck Calendar also leads on iOS requirement (6.0 vs 17.0). NerdCycle's advantage is update cadence (weekly vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. NerdCycle sells 2 in-app purchases, starting at $9.99 per year. Surecheck Calendar asks for nothing beyond the download.

Surecheck Calendar ships an update every 6 weeks, NerdCycle weekly. The most recent releases landed on October 20, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Surecheck Calendar | NerdCycle |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Weekly** |
| Size | 22 MB | 20 MB |
| Requires iOS | **6.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Unicoms Headquarters EOOD](https://appshunter.io/developer/958079323) | [VLADO IVANKOVIC](https://appshunter.io/developer/1892304588) |

## What reviewers say

### Surecheck Calendar

[App page](https://appshunter.io/ios/app/surecheck-calendar/id964879310)

**Features:** macOS Compatibility

**In-app purchases:** none


### NerdCycle

[App page](https://appshunter.io/ios/app/nerdcycle-period-tracker/id6761985145)

**Features:** Family Sharing, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NerdCycle Premium | $9.99 | per year |
| NerdCycle Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is Surecheck Calendar free?

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

### Is NerdCycle free?

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

### Do Surecheck Calendar or NerdCycle have ads?

Neither Surecheck Calendar nor NerdCycle shows ads.

### Which is updated more often, Surecheck Calendar or NerdCycle?

Surecheck Calendar ships an update every 6 weeks, and NerdCycle weekly. Most recently, Surecheck Calendar was updated on October 20, 2026 and NerdCycle on October 15, 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.*