Best apps like undoDay

7+ similar apps compared and reviewed

4.7 avg rating
7 free apps
Updated September 2026

undoDay is great, but it's not the only option. Explore 7+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.

Top Alternatives to undoDay

Simpluna Period Calendar#1

Simpluna Period Calendar by Omoidasu, Inc.

Simple Menstrual Cycle Tracker
Editor's Choice
💪 Health & Fitness
4.7😊(256 ratings)
FreeIn-App Purchases
Simpluna Period Calendar screenshot 1
Simpluna Period Calendar screenshot 2
Simpluna Period Calendar screenshot 3

This app helps you track your menstrual cycle with simple period date entry and prediction. It offers a clean interface with no ads, allowing you to record past periods, get notifications, and secure your data. Optional paid features unlock advanced tracking and customization.

What We Love

  • 🚀 Simple, clear, and easy to use
  • 🔒 No ads or unnecessary features
  • 👍 Customizable, clean design
  • 👍 Accurate period predictions
  • 👍 Useful reminders and notifications

Room to Improve

  • 🐛 Occasional glitches and crashes
  • 🔋 Compatibility issues with newer devices
Yurit Meal Planner - Food Log#3

Yurit Meal Planner - Food Log by Sangyong Lee (Bus)

Meal Planning, Kids Meal Plan
Worth Considering
💪 Health & Fitness
4.9(16 ratings)
FreeIn-App Purchases
Yurit Meal Planner - Food Log screenshot 1
Yurit Meal Planner - Food Log screenshot 2
Yurit Meal Planner - Food Log screenshot 3
Yurit Meal Planner - Food Log screenshot 4
Yurit Meal Planner - Food Log screenshot 5
Yurit Meal Planner - Food Log screenshot 6

Plan your meals, track your calorie intake, and manage your groceries. Get AI-powered recipe suggestions and organize your food expenses. Supports various diet plans and offers real-time meal sharing.

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Selfit - Fitness Planner
Selfit - Fitness Planner
Selfit - Fitness Planner
Simple Workout App
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This app provides a straightforward way to plan and track your workouts. Easily log your exercise history, add custom exercises, and review your progress on a calendar. It supports various measurement units and offers customization options for languages, fonts, and themes.

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Duffy - Steps Complication
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Duffy - Steps Complication
Elegant steps complication
Free

This app displays your daily step count directly on your Apple Watch face as a complication. It offers a full watch app for detailed stats and goal notifications, plus a companion iPhone app for deeper data analysis and trends. Access your fitness data at a glance without opening the Activity app.

Watch face complication for step countFull watch app for steps, flights, distanceDaily step goal notifications
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챌린저스 - 돈이 돌아오는 쇼핑 앱
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다양한 제품 득템하기, 자기관리 하고 상금 받기
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This app offers a unique shopping experience where users can get money back on purchases and participate in challenges to improve themselves. It combines smart self-management with opportunities to acquire desirable products at significant discounts or even for free.

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