# Day75 vs KcalCulator

The clearest difference is in-app purchases: KcalCulator at none against Day75's 2. KcalCulator also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Day75 sells 2 in-app purchases, starting at $3.99 per month. KcalCulator asks for nothing beyond the download.

## The numbers

| Metric | Day75 | KcalCulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/day75-hard-challenge-tracker/id6757592581/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 117 MB | 1 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [OKCOKER LLC](https://appshunter.io/developer/1180479091) | [Zertyn LLC](https://appshunter.io/developer/6785301572) |

## What reviewers say

### Day75

[App page](https://appshunter.io/ios/app/day75-hard-challenge-tracker/id6757592581)

This app guides users through a 75-day challenge focused on building discipline and mental toughness. It provides tools to track daily tasks like workouts, diet, water intake, and reading, with options for custom challenges and progress visualization.

**Highlights:** Daily task checklist, Smart countdown timer, Water intake tracker, Reading log, Progress photo journal, Challenge analytics, Custom challenge durations

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Day75 Monthly | $3.99 | per month |
| Day75 Yearly | $29.99 | per year |


### KcalCulator

[App page](https://appshunter.io/ios/app/kcalculator-kcal-tracker/id6792215812)

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

**In-app purchases:** none


## Frequently asked questions

### Is Day75 free?

Day75 is free to download, with in-app purchases available.

### Is KcalCulator free?

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

### Do Day75 or KcalCulator have ads?

Day75 shows ads; KcalCulator does not.

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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.*