Best apps like Lettre.app - PenPals for life

10+ similar apps compared and reviewed

4.6 avg rating
10 free apps
Updated July 2026

Looking for something like Lettre.app? We've analyzed 10+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.

Top Alternatives to Lettre.app

Infinity Coloring Book: Infini#1

Infinity Coloring Book: Infini by Infinitefy OU

Color Therapy: Paint & ASMR
Editor's Choice
🌟 Lifestyle
4.5(1.1K ratings)
FreeAdsIn-App Purchases
Infinity Coloring Book: Infini screenshot 1
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Infinity Coloring Book: Infini screenshot 3
Infinity Coloring Book: Infini screenshot 4
Infinity Coloring Book: Infini screenshot 5

Explore endless cozy illustrations with this digital coloring book. Zoom in to discover hidden details and unlock new scenes, offering a peaceful and immersive creative journey for all ages. Relax, reduce stress, and enjoy a mindful escape with soothing visuals and ASMR sounds.

Lake: Coloring Book for Adults#2

Lake: Coloring Book for Adults by Lake d.o.o.

Color Therapy, Calming ASMR
Strong Contender
🌟 Lifestyle
4.6😊(80K ratings)
FreeIn-App Purchases
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Explore a vast collection of hand-drawn illustrations by independent artists. Unleash your creativity with a comprehensive set of artistic brushes, over 700 color shades, and various palettes. This app offers a relaxing and therapeutic coloring experience, supporting artists worldwide.

What We Love

  • 💎 Fantastic and unique artwork
  • 🎨 Relaxing and therapeutic coloring experience
  • 👍 Intuitive and user-friendly interface
  • 🌈 Wide variety of color palettes and tools

Room to Improve

  • 💰 Subscription model is expensive for some users
  • 🔒 Many drawings locked behind premium paywall
  • 🎨 Limited free coloring options
Bujo - Bullet Journal&Planner#3

Bujo - Bullet Journal&Planner by Nanning Chaojia Technology Co., Ltd.

ADHD Daily Weekly Monthly Plan
Worth Considering
🌟 Lifestyle
4.6😊(1K ratings)
FreeIn-App Purchases
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This app helps you track your mood, activities, and habits through a digital bullet journal. It offers a simple way to log your day, understand your patterns, and improve self-care with features like mood tracking, task management, and photo additions. Designed for easy daily use, it aims to support a healthier lifestyle.

What We Love

  • 💕 Cute and aesthetically pleasing
  • 🗓️ Helpful for organization and planning
  • 🎨 Customizable features
  • 💰 Affordable one-time purchase option

Room to Improve

  • 🐛 Glitches and bugs
  • 🔒 Limited free features, most locked behind paywall
  • 🔄 Sync issues between devices

More apps like Lettre.app

4
Artasy - Cozy Coloring Book
Artasy - Cozy Coloring Book
Artasy - Cozy Coloring Book
Calm Color Therapy & Cute Art
Free

This app offers a calming digital space for adults to unwind through coloring. Explore over 2,000 hand-crafted illustrations of cozy scenes and peaceful moments, using soft brushes and curated palettes to reduce stress and foster creativity.

2,000+ hand-crafted artworksApple Pencil supportCozy brushes and palettes
🌟 Lifestyle
(261)
free with in-app purchases
5
Journal - Diary & Planner
Journal - Diary & Planner
Journal - Diary & Planner
Cute diary with stickers
Free

This app allows users to create a personal diary with a variety of cute stickers and backgrounds. It offers automatic saving of drafts, password protection for privacy, and the ability to insert photos. The app is also optimized for iPad use.

Customizable stickers and backgroundsAutomatic draft savingPassword protection for privacy
🌟 Lifestyle
(1.5K)
free with in-app purchases
6
Adult Coloring Book - Bloom
Adult Coloring Book - Bloom
Adult Coloring Book - Bloom
Color Therapy & Painting Bloom
Free

A digital coloring book designed for adults to promote relaxation and mindful creativity. Explore a vast library of detailed illustrations and soothing color palettes to de-stress and create beautiful artwork.

1000+ adult coloring pagesMultiple categories (mandalas, flowers, animals)Relaxing color palettes
🌟 Lifestyle
(7.1K)
free with in-app purchases
7
피그먼트 - 컬러링북
피그먼트 - 컬러링북
피그먼트 - 컬러링북
컬러링、색칠게임、색칠공부
Free

This app offers a digital coloring experience designed for relaxation and stress relief. It provides thousands of illustrations, realistic painting tools, and a supportive community for sharing creations and learning new techniques.

Thousands of coloring pagesRealistic painting toolsTap-to-fill and freehand modes
🌟 Lifestyle
(214K)
free with in-app purchases
8
Cozy Coloring
Cozy Coloring
Cozy Coloring
relaxing digital coloring book
Free

Unwind with a digital coloring book featuring hand-drawn art by real artists. Explore various coloring tools and palettes to de-stress or express your creativity. Enjoy a cozy hobby with simple, stress-free access.

Hand-drawn illustrations by real artistsIntuitive coloring tools (paint bucket, watercolor, marker, pencil, crayon, spray paint)Thoughtfully crafted color palettes
🌟 Lifestyle
(24)
free with in-app purchases
9
My Daily Diary - Mood Journal
My Daily Diary - Mood Journal
My Daily Diary - Mood Journal
Mood Tracker & Daily Journal
Free

This app allows you to document your thoughts, feelings, and important moments. It offers extensive customization options, including stickers, voice notes, and images, to enhance your entries. Track your moods over time to gain emotional insights and ensure your private journal remains secure with password protection.

Capture thoughts and feelingsCustomize entries with stickers, voice notes, and imagesTrack moods with each journal entry
🌟 Lifestyle
(10K)
free with in-app purchases
10
Zen Flip Clock - Minimal Timer
Zen Flip Clock - Minimal Timer
Zen Flip Clock - Minimal Timer
Digital pomodoro and widgets
Free

This app offers a minimalist clock experience with multiple themes and powerful focus tools. It functions as a fullscreen desk clock and includes a Pomodoro timer, stopwatch, and hourly chime to help manage time and improve productivity.

Multiple clock themes (flip, digital, minimalist)Fullscreen desk clock functionalityPomodoro timer for focused work sessions
🌟 Lifestyle
(6.1K)
free with in-app purchases