Doodle Turtle vs Devprompt
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Doodle Turtle
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Doodle Turtle draws at the speed of a three-year-old. Every other drawing app moves at a grown-up's pace. A line appears, then another, then another, and your child is still working on the first one. So you end up hovering over the pause button, rewinding, pausing again. Ask any parent of a preschooler how that goes. Doodle Turtle fixes it in the simplest possible way. It draws one line, slowly. Then it stops. And it waits, with a real and generous pause, long enough for a small hand to finish before the next line begins. No pause button required. Nobody is rushing anybody. That is the whole app. HOW IT WORKS 1. Your child picks a picture: a cat, a fish, a house, an ice cream. 2. Doodle Turtle draws it once, all the way through, so your child can see where it is going. 3. Then it starts again, one stroke at a time, with a warm voice saying what to draw ("A big round face!"), a gentle ding, and a quiet pause while your child draws that stroke on their own paper. 4. At the end, their drawing goes into a picture frame. Because it should. WHAT IS INSIDE - Slow, stroke-by-stroke drawing lessons made for ages 3 to 5 - A spoken cue for every single stroke, clear and encouraging - Two speeds: Turtle for the youngest hands, Bunny once they are confident - Tap mode, where your child taps when they are ready, so the app never moves first - Draw on the screen: trace over a faded guide with a fingertip - Free Doodle: a blank canvas for when they just want to invent something - Coloring: tap a space to fill it, or color with a crayon that stays inside the lines - Printable tracing sheets for every picture, for crayons and real paper - Works completely offline, in the car, on a plane, in a waiting room BUILT FOR SMALL PEOPLE - No ads. Not one, anywhere, ever. - No in-app purchases, no subscriptions, no upsells. - No accounts and no sign-in. Nothing to type. - No data collected. No analytics, no tracking, no server. The app makes no network requests at all. - The one link that leaves the app sits behind a parental gate a young child cannot pass. - Big buttons, no menus to get lost in, nothing breakable. WHY A TURTLE I built this for my daughter, who is three and a half, who loves to draw, and who was getting frustrated with every drawing video we tried because all of them went too fast. She picked the turtle. He is slow, and that is entirely the point. Doodle Turtle is quiet, patient, and never in a hurry. Neither is your kid.
Devprompt
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Devprompt is for keeping your knowledge as a developer โ not looking things up, which a model does better, but knowing them, which only you can. Every question is written to be learned. One line you can keep. A sentence you can say out loud in an interview. Plain terms when the jargon is in the way, then the depth and the code underneath. And at the end of each one, two questions to answer before you move on, because the difference between knowing a thing and having read it is whether you can produce the answer with the page closed. TWO A DAY Open the app and there are two readings waiting, from two different subjects, chosen for today. Read them, check yourself, close the app. One a day is the habit; two is a good day. A random button is there for a third. 600+ QUESTIONS, 30+ CATEGORIES Start here if none of it is familiar: what a program is, what a variable is, what a server is. Then JavaScript, TypeScript, Python, Ruby, Go and SQL. React and the browser. Node, databases and how to tune them, Kafka, system design. Behavioral rounds and the career questions around them. AWS, Google Cloud and Azure. Containers, Terraform, CI/CD, GitHub Actions, SRE and security. AI and how to build with it. Algorithms, testing, Git. Everything a 2026 interview loop actually asks, and everything a working developer is expected to know. IN THE LANGUAGE YOU ARE LEARNING The foundational questions carry every sample in JavaScript, Python, TypeScript and Ruby. Pick once, and every example switches. WHAT IS CHANGING A Trends tab: what is rising, what is established, what is fading โ and what to do about it. Every entry is dated, so you can see how recent the judgment is. BUILT FOR THE HABIT Search across everything. Browse by level, by category, by language, or by track. Track what you have done, keep a streak, mark what to review. A Companion mode that listens to an interview and shows the answer to what was just asked. OFFLINE, PRIVATE The whole library ships inside the app, and nothing works worse without a connection. No account. Your progress, your streak and your bookmarks stay on your phone. The app checks once a day whether a newer version exists and sends anonymous usage counts โ which screens and questions are opened, never anything you type or say โ tied to a random install token, not to you or your device. ONE PURCHASE Try the free questions in every category. One purchase unlocks the whole library forever, including every category added later. No subscription. New content every month.
Screenshots
Verdict
The clearest difference is in-app purchases: Doodle Turtle at none against Devprompt's 1. On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Devprompt sells 1 one-off in-app purchase. Doodle Turtle asks for nothing beyond the download.
| Parameter | Doodle Turtle | Devprompt |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days | โ |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPod |
| Requires iOS | 15.0 โ better | 15.1 |
| Further details โ not scored | ||
| Size | 37 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | AO TANG | Antonio Schaffert |
In-app purchases
Doodle Turtle
No in-app purchases
Devprompt
- Devprompt Everything$9.99









