# Delta Calendar — Live with Intention.

> Live with Intention. (iPhone/iPad app by ANDY LOJAS.)

- Source: https://appshunter.io/ios/app/delta-calendar/id6744043360 (this page in markdown: same URL + `.md`)
- Developer: [ANDY LOJAS](https://appshunter.io/developer/1799458054)
- Category: Productivity, Medical
- Price: Free with in-app purchases
- Age rating: 17+
- Requires: iOS 17.6 · 22 MB
- Languages: English
- Released: 2025-04-06
- Data updated: 2026-06-01
- User reviews in markdown: https://appshunter.io/ios/app/delta-calendar/id6744043360/reviews.md

## What is Delta Calendar?

Delta Calendar: Your Personal Life Analytics Tool

Delta Calendar empowers you to track a wide range of daily activities—from one-time events like meals to recurring habits, your daily intake (like supplements or caffeine), and environmental factors like location and weather—to uncover their impact on your health and performance. Whether you’re exploring how your morning coffee influences attention, how exercise boosts your chess ranking, or how your surroundings affect memory, this app provides a robust framework to log, analyze, and optimize your lifestyle.

Key Features and Functionality

Intuitive Calendar Interface: Log one-time events (e.g., a workout), recurring habits (e.g., meditation), duration-based events (e.g., employment duration), and environmental changes with ease. Categorize and tag entries to focus on what matters most to you.
Detailed Intake Tracking: Monitor items like caffeine, medications, or supplements with detailed pharmacokinetic data (peak time, half-life) and customizable routines to manage daily schedules. Understand how what you take affects your body and mind.
Custom Metric Tracking: Define and track personalized metrics like memory, attention, or performance indicators. Create a dataset tailored to your unique goals and lifestyle.
Optional Integrations: Connect to HealthKit for automatic step tracking or link your Chess.com username to monitor ELO ratings alongside your daily activities.
Environmental Insights: Automatically or manually log your location and weather data (e.g., temperature) to see how your surroundings influence your well-being and metrics.
Powerful Analytics Engine: Discover correlations between events and metrics—like how screen time affects focus or weather impacts mood—with clear visual reports spanning daily, weekly, or monthly views.
Flexible Data Views: Analyze your data across different timeframes to gain both immediate insights and long-term trends, helping you make informed decisions.
Why Use Delta Calendar?

Unlock a deeper understanding of how your choices, routines, and environment shape your health, cognitive abilities, and performance. Whether you’re a self-improvement enthusiast, a data-driven professional, or simply curious about your lifestyle, Delta Calendar equips you with the tools to optimize your well-being and achieve your goals.

Get Started Today

Start tracking today to reveal the patterns that define your life. Your path to a smarter, healthier you begins now!

By downloading this app, you agree to the Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Unlimited Insights | $1.99 | per month |
| Premium Cloud Sync & Insights | $7.99 | per month |
| AI Reports | $19.99 | per month |
| Pilot | $99.99 | per month |
| Cohort | $189.99 | per month |



## Version history (last 5 releases)

### 1.7.118 — 2025-09-10

-New AI Reports.
-New Create an Account.
-New Research Mode.
-Added import "Import Data from Backup" and "Delete All Data" buttons to settings.
-Improved Settings UI.
-Removed Shop Tab

### 1.7.117 — 2025-07-07

-Increased free insights limit from 3 to 100
-Insights UI improvements
-Fixed a bug that prevented updating values on days other than the current date
-Fixed a bug that prevented adding and changing units of measurement

### 1.7.116 — 2025-06-03

-Added multiple lanes for overlapping events in schedule
-Optional syncing between Apple Calendar
-Added interactive events in the schedule 
-Changed App Icon Logo
-Fixed a bug where multiple ethanol intakes would increase the elimination rate

### 1.7.115 — 2025-05-12

-Added single order kinetics calculations
-Added Weight and Sex inputs in settings for improved pharmacokinetics 
-Added Ethanol pharmacokinetics
-Added annotations to pharmacokinetics
-Optimized loading the Today tab
-Optimized Calendar scrolling

### 1.7.114 — 2025-05-11

-Added Event previews
-Optimized Calendar by reducing load on the main thread
-Fixed a bug where the year calendar view would only navigate to the selected month if it was already loaded
-Fixed a bug where events would show up on invisible days

## More apps by ANDY LOJAS

- [MathMind: Test Your Skills](https://appshunter.io/ios/app/mathmind-test-your-skills/id6746140680)
- [ChemSpark: Unlock Chemistry](https://appshunter.io/ios/app/chemspark-unlock-chemistry/id6746169230)
- [Ascent: Path to Prosperity](https://appshunter.io/ios/app/ascent-path-to-prosperity/id6746658480)
- [BioPath: Explore Biology](https://appshunter.io/ios/app/biopath-explore-biology/id6746768299)
- [Lexicon: Master English](https://appshunter.io/ios/app/lexicon-master-english/id6757132710)

All apps by ANDY LOJAS: https://appshunter.io/developer/1799458054

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*