# Sun Day Tracker vs ReceiptCal

The clearest difference is update cadence: ReceiptCal at every 6 days against Sun Day Tracker's monthly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sun Day Tracker ships an update monthly, ReceiptCal every 6 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Sun Day Tracker | ReceiptCal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (28 ratings)](https://appshunter.io/ios/app/sun-day-tracker/id6748545544/reviews)** | — |
| Number of ratings | **28** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 6 days** |
| Monetization | Free | — |
| Size | 1 MB | 18 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [permissionless tech, llc](https://appshunter.io/developer/1824145893) | [Mihir Kavishwar](https://appshunter.io/developer/6793719741) |

## What reviewers say

### Sun Day Tracker

[App page](https://appshunter.io/ios/app/sun-day-tracker/id6748545544)

Monitor your daily vitamin D absorption from sunlight exposure. This straightforward application helps you keep track of your sun-related vitamin D intake.

**Highlights:** Track daily vitamin D intake, Sunlight exposure monitoring, Simple interface, Daily tracking

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

**In-app purchases:** none


### ReceiptCal

[App page](https://appshunter.io/ios/app/receiptcal/id6793719739)

**In-app purchases:** none


## Frequently asked questions

### Is Sun Day Tracker free?

Sun Day Tracker is free to download, with no in-app purchases.

### Is ReceiptCal free?

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

### Do Sun Day Tracker or ReceiptCal have ads?

Neither Sun Day Tracker nor ReceiptCal shows ads.

### Which is updated more often, Sun Day Tracker or ReceiptCal?

Sun Day Tracker ships an update monthly, and ReceiptCal every 6 days. Most recently, Sun Day Tracker was updated on October 30, 2026 and ReceiptCal on October 31, 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.*