Comparison

chrtz vs Sleepy Train

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

chrtz

Features
Read full description

A step‑based character ranking app with heatmap visibility and group competition. chrtz turns your steps into rank. Pick your favorite character, compete in solo or group rankings, and climb the leaderboard. Top spots unlock visibility perks—like message highlights and a larger presence on the heatmap. Track progress with Live Activity, earn rewards, and customize your character’s look with avatars and backgrounds. Every step counts, and every rank change is real. Highlights Step‑based solo & group rankings Top‑rank visibility perks (message highlight, heatmap presence) Live Activity for quick progress checks Character customization (avatars & backgrounds) Events and rewards tied to activity

About

Sleepy Train

This app helps children establish a calming bedtime routine through interactive play with a train character. It addresses big feelings and teaches breathing exercises, making bedtime a peaceful experience for both child and parent. The content is fully spoken and designed for independent use by young children.

Highlights
  • Interactive bedtime ritual
  • Emotional regulation tools
  • Guided breathing exercises
  • Fully spoken content
  • Offline functionality
  • Ad-free experience
Features
Read full description

Sleepy is contagious. Every night, your child puts a little train to bed. They feed it, wash it, and tuck it in. Somewhere between the washing and the tucking, bedtime stops being a fight — because whoever does the tucking in gets sleepy too. THE GOODNIGHT RITUAL A gentle wind-down your child runs themselves. The screen dims as bedtime gets closer, the depot gets quiet, and the last thing anyone hears is a lullaby, soft rain, or a sleep story. The screen says goodnight. So does your kid. BIG FEELINGS AND TANTRUMS Feelings are weather here — never bad, always passing. Your child checks in with how they feel, helps their train friends through grumpy mornings and stormy afternoons, and learns the words for what's happening inside. No wrong answers. No shame. The storm always passes. BREATHE WITH THE TRAIN Puff, puff, slow. Breathing exercises built around train steam — the kind even wiggly two-year-olds will actually follow, because the train does it first. A CALM FRIEND FOR BIG DAYS The same friend is waiting every day. Hard days get a gentler goodnight. FULLY SPOKEN — NO READING NEEDED Over 1,100 recorded lines. Your child can do everything on their own, from the first tap to the last goodnight. BUILT FOR PARENTS WHO CHECK • No ads. Ever. • No subscription. $4.99 unlocks everything, once. • No data collected. Nothing tracked, nothing shared. • Works completely offline — airplane mode, road trips, blackout bedtime. • COPPA compliant. Made for ages 2–6. Made by a parent, for our own bedtime battles. If it helps your family half as much as it helped mine, it was worth building. From Little Wheels — the maker of Talk & Listen and Art & Music.

Screenshots

chrtz3 screens
Sleepy Train4 screens

Verdict

The call

The clearest difference is in-app purchases: chrtz at none against Sleepy Train's 1. chrtz also leads on update cadence (weekly vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Sleepy Train sells 1 one-off in-app purchase. chrtz asks for nothing beyond the download.

UpkeepUpdate frequency

chrtz ships an update weekly, Sleepy Train every 2 weeks. The most recent releases landed on October 15, 2026 and October 21, 2026 respectively.

Scorecard2 real differences · 8 level
chrtz versus Sleepy Train: the parameters behind the verdict, then further details
ParameterchrtzSleepy Train
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Paid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.215.1 — better
Further details — not scored
Size59 MB615 MB
Age rating4+4+
DeveloperSungsu ChoiRecord Creative Co. LLC

In-app purchases

None

chrtz

No in-app purchases

1 purchases

Sleepy Train

One-time1
  • Sleepy Train - Full Unlock$4.99

Questions

Is chrtz free?
chrtz is free to download, with no in-app purchases.
Is Sleepy Train free?
Sleepy Train is free to download, with in-app purchases available.
Do chrtz or Sleepy Train have ads?
Neither chrtz nor Sleepy Train shows ads.
Which is updated more often, chrtz or Sleepy Train?
chrtz ships an update weekly, and Sleepy Train every 2 weeks. Most recently, chrtz was updated on October 15, 2026 and Sleepy Train on October 21, 2026.

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