wriggles vs Train Drill
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
wriggles
A charming interactive toy app where a caterpillar hatches and wriggles on screen. Feed it to help it grow into a butterfly, and explore its reactions to touch. Designed for young children to freely play and stimulate their curiosity.
- Interactive caterpillar growth simulation
- Transform into a butterfly
- Touch-based reactions
- Free play and exploration
- Stimulates curiosity
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As you swipe the screen, a caterpillar is born and starts to wriggle around. Eat foods and grow up to be a beautiful butterfly! Touch various places and enjoy the reaction! It is a cute toy app that can play freely and tickle curiosity. Let small children play with it as if it were a toy.
Train Drill
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Learn addition and subtraction through train coupling and uncoupling. Two trains couple with a satisfying "clunk!" — how many cars in all? Cars uncouple from the consist — how many are left? The coupling and uncoupling animations turn numbers into something you can see and count, so arithmetic sinks in through play. ■ Features - Adventure map with 9 routes: forest, mountains, sea, and the stars - Clear every addition route to unlock Subtraction mode - Train collection: stainless, two-tone liveries, and special cars - Special showcase: Shinkansen, steam locomotive, and a luxury cruise train - Rank up as you answer: Trainee -> Local -> Express -> Limited Express -> Shinkansen Driver - Parents' dashboard: weekly play counts and tricky problems - Built-in daily limits (Free: 3 stages/day) - No ads, all data stays on the device ■ Plans - Free: 3 stages/day - Mini: 10 stages/day + Subtraction mode - Unlimited: unlimited + Subtraction mode ■ Terms & Privacy - Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ - Privacy Policy: https://kuromojilabs.github.io/traindrill-site/privacy.html
Screenshots
Verdict
The clearest difference is update cadence: Train Drill at every 2 months against wriggles's every 8 months. On price, ads, in-app purchases and device support 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
Both are free to download. wriggles sells 1 one-off in-app purchase and Train Drill sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
wriggles ships an update every 8 months, Train Drill every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | wriggles | Train Drill |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 8 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 112 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | TAKURO IMAGAWA | Kuromoji LLC |
In-app purchases
wriggles
- Add content$1.99
Train Drill
- Mini$0.991 Month
- Unlimited$1.991 Month
