# D Minder Pro vs Project Function

The clearest difference is in-app purchases: Project Function at none against D Minder Pro's 2. Project Function also leads on ads (none vs shown) and device support (4 vs 2). D Minder Pro's advantage is update cadence (every 2 days vs every 6 weeks). On price there is nothing between them.

Both are free to download. D Minder Pro sells 2 one-off in-app purchases. Project Function asks for nothing beyond the download.

D Minder Pro ships an update every 2 days, Project Function every 6 weeks. The most recent releases landed on September 23, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | D Minder Pro | Project Function |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1.8K ratings)](https://appshunter.io/ios/app/d-minder-pro/id547102495/reviews)** | — |
| Number of ratings | **1.8K** | — |
| Positive reviews | 33.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 6 weeks |
| Monetization | Freemium | — |
| Size | 37 MB | 181 MB |
| Requires iOS | 17.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [ontometrics](https://appshunter.io/developer/410064693) | [Project Function LLC](https://appshunter.io/developer/1790112444) |

## What reviewers say

### D Minder Pro

[App page](https://appshunter.io/ios/app/d-minder-pro/id547102495)

Track and manage your Vitamin D intake and sun exposure. This app calculates optimal sun exposure times based on your profile and location, and integrates with Apple Health for seamless data exchange. It also provides forecasts and notifications for vitamin D generation opportunities.

**Highlights:** Vitamin D tracking and management, Apple Health integration, Sun exposure calculation, Optimal exposure time alerts, Daily forecasts and solar position, History and future event scheduling

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DMinder Premium | $1.99 | one-time |
| Lifetime Ad Removal | $24.99 | one-time |

**What reviewers like**

- 🚀 Useful for tracking vitamin D levels
- 🌞 Helps with safe sun exposure
- 👍 Accurate calculations
- 🔋 Doesn't drain battery
- 💡 Innovative concept

**What reviewers complain about**

- 🐛 Crashes or bugs
- 🔍 Difficult to use or navigate
- 🔧 Lacks customization options
- 📊 Inaccurate data or estimates
- 💸 Paid version not worth the cost

**Reported bugs**

- App crashes on launch or during use
- Location settings not working properly
- Inconsistent data or calculations between devices
- Inability to save or sync user data
- Overcast detection not functioning correctly

**Requested features**

- Add more food options for vitamin D
- Ability to edit past sun sessions
- Provide more detailed reports and analytics
- Add reminders or notifications for sun exposure
- Allow customization of skin type and location


### Project Function

[App page](https://appshunter.io/ios/app/project-function/id6740467390)

**Features:** Apple Wallet, Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is D Minder Pro free?

D Minder Pro is free to download, with in-app purchases available.

### Is Project Function free?

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

### Do D Minder Pro or Project Function have ads?

D Minder Pro shows ads; Project Function does not.

### Which is updated more often, D Minder Pro or Project Function?

D Minder Pro ships an update every 2 days, and Project Function every 6 weeks. Most recently, D Minder Pro was updated on September 23, 2026 and Project Function on September 22, 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.*