# Nightpenny vs Sleep Debt Tracker Calculator

Nightpenny and Sleep Debt Tracker Calculator 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. Nightpenny sells 2 in-app purchases, starting at $3.99 per month and Sleep Debt Tracker Calculator sells 3 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Nightpenny ships an update every 4 weeks, Sleep Debt Tracker Calculator every 3 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | Nightpenny | Sleep Debt Tracker Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Size | 59 MB | 5 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Sobstyl](https://appshunter.io/developer/794108519) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### Nightpenny

[App page](https://appshunter.io/ios/app/nightpenny/id6763649335)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $3.99 | per month |
| Annual Premium | $34.99 | per year |


### Sleep Debt Tracker Calculator

[App page](https://appshunter.io/ios/app/sleep-debt-tracker-calculator/id6771320331)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $5.99 | per 7 days |
| Yearly | $29.99 | per year |
| Lifetime Pro | $59.99 | one-time |


## Frequently asked questions

### Is Nightpenny free?

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

### Is Sleep Debt Tracker Calculator free?

Sleep Debt Tracker Calculator is free to download, with in-app purchases available.

### Do Nightpenny or Sleep Debt Tracker Calculator have ads?

Neither Nightpenny nor Sleep Debt Tracker Calculator shows ads.

### Which is updated more often, Nightpenny or Sleep Debt Tracker Calculator?

Nightpenny ships an update every 4 weeks, and Sleep Debt Tracker Calculator every 3 weeks. Most recently, Nightpenny was updated on October 31, 2026 and Sleep Debt Tracker Calculator on October 31, 2026.

---

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