Best Challenge21 alternatives: apps like Challenge21

10+ similar apps compared and reviewed

4.4 avg rating
10 free apps
Updated November 2026
Challenge21
Challenge21
Astra Zenith Ltd.

Whether you want more options like Challenge21 or a completely different take on the same concept, our curated list of 10+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.

Top Alternatives to Challenge21

Sotto: For the People You Love#2

Sotto: For the People You Love by Shiang-Jih Shih

People notes, gifts & sizes
Strong Contender
🌟 Lifestyle
5.0(1 ratings)
FreeIn-App Purchases
Sotto: For the People You Love screenshot 1
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Sotto: For the People You Love screenshot 4
Sotto: For the People You Love screenshot 5

This app helps you remember important details about loved ones, like gift sizes, birthdays, allergies, and personal notes. It's designed for privacy, keeping all information on your device with Face ID protection. Choose from seven editorial themes to personalize your experience.

Monologue: Diary & Voice Notes#3

Monologue: Diary & Voice Notes by 书旗 莫

Private journal, daily writing
Worth Considering
🌟 Lifestyle
0.0(0 ratings)
FreeIn-App Purchases
Monologue: Diary & Voice Notes screenshot 1
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Monologue: Diary & Voice Notes screenshot 6

A minimalist journaling app for private reflection. It offers secure cloud synchronization, powerful search, and versatile data export options to preserve your thoughts and memories across devices.

More apps like Challenge21

4
Antodo - Simple todo plan memo
Antodo - Simple todo plan memo
Antodo - Simple todo plan memo
A reliable helper to lazy
Free

This app helps you stay organized and motivated by breaking down tasks into manageable steps. Earn rewards for completing to-dos and discover the lives of ant characters as you progress. It's designed to encourage consistent effort, even for small tasks.

Task managementDaily planningGamified rewards (star candies)
🌟 Lifestyle
(7)
free with in-app purchases
5
禪修計時
禪修計時
禪修計時
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Free
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6
JP Smart SIM
JP Smart SIM
JP Smart SIM
by DXHUB INC.
Free
🌟 Lifestyle
(0)
7
Music Alarm Clock: Radio App
Music Alarm Clock: Radio App
Music Alarm Clock: Radio App
Sleep, Loud Sounds & Reminder
Free

Wake up to your favorite radio stations with customizable clock themes. Organize your day with integrated alarms, events, tasks, and notes. Stay informed with real-time weather forecasts.

Radio station alarmsCustomizable clock themesEvent and task management
🌟 Lifestyle
(1.6K)
free with in-app purchases
8
林间聊愈室-懂你情绪,陪你成长的AI伙伴
林间聊愈室-懂你情绪,陪你成长的AI伙伴
林间聊愈室-懂你情绪,陪你成长的AI伙伴
心理陪伴,温暖树洞,emo救星,治愈小动物,成长教练
Free

This app offers AI-powered emotional companionship and guidance. It features interactive AI animals that provide support, tools for emotional processing, personalized growth plans, and memory tracking. Designed to help users navigate difficult emotions and personal development.

AI emotional companion animals200+ emotional/stress relief toolsPersonalized 21-day growth plans
🌟 Lifestyle
(14)
free with in-app purchases
9
Sutra Moments - Copy Sutras
Sutra Moments - Copy Sutras
Sutra Moments - Copy Sutras
Copy Sutras, Chant & Meditate
Free

This app offers a serene digital space for practicing Buddhist sutras through handwritten copying, reading, and recitation. It includes a daily fortune feature and tracks your progress with a practice calendar and Zen path visualization.

Handwritten sutra copying with advanced brush engine51 sutras, mantras, and Buddha namesPunctured reading mode with adjustable settings
🌟 Lifestyle
(3)
freemium
10
Denma: Tap to Vibrate
Denma: Tap to Vibrate
Denma: Tap to Vibrate
Simple fun with friends
Free

This app offers a simple way to engage your iPhone's vibration motor for lighthearted fun. Tap the on-screen image to activate and deactivate the vibration, suitable for solo play or with friends. It utilizes the device's built-in vibration and is intended for entertainment purposes only.

Tap to activate vibrationTap to deactivate vibrationUses iPhone's built-in vibration
🌟 Lifestyle
(78)
ad-supported