Poor Bunny! vs 1st Principle
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Poor Bunny!
Guide a cute bunny to eat carrots and dodge traps in this high-score chasing game. Unlock over 100 unique bunnies and enjoy various multiplayer modes, including co-op and versus.
- High score chasing gameplay
- Unlockable bunnies (100+)
- Avoidance of traps
- Local multiplayer modes
- Co-op and Versus modes
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Poor Bunny! Is a cute high score chaser where you control a little bunny who must eat all the tasty carrots while avoiding rapidly appearing traps. How long can you survive before you get overwhelmed? Unlock and play as over 100 unique bunnies! Play solo in single-player mode, or play with a friend in local multiplayer! Work together in Co-Op mode, or compete who eats the most carrots in Versus mode!
1st Principle
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1st Principle is a calculus platformer built on a live graph. You run and jump along y = f(x), and the derivative decides where you can stand: where the slope gets too steep, the path breaks into gaps and hazards. Every level turns an idea from math into something you can see and play. PLAY THE MATH – Platforms follow the curve and f′(x) shapes the gaps and hazards, so a function and its derivative stay connected in your head – 59 levels: parabolas, sine and cosine, Maclaurin and Taylor series, multivariable slices, area under the curve and Riemann sums, damped oscillation, polar roses, logistic growth, Fourier and Laplace transforms, Big O growth rates, aerospace and physics stories, and boss levels such as the Mandelbrot set and the Lorenz attractor – Earn up to three stars per level, beat your best score and unlock achievements – A daily challenge with goals and a streak to keep – Hints that explain the rule behind each level GRAPHING CALCULATOR MODE Switch to a free graph workspace from the menu: type an expression, adjust it, then zoom and pan (pinch on touch screens) to explore functions without the platformer. LEARN AS YOU PLAY An in-game reader covers differentiation rules, definite and indefinite integrals and topic glossaries, with short study notes for AP Calculus BC, AP Physics C, AMC 10/12, TMUA and MAT. The exam notes are unofficial study companions and are not affiliated with College Board, MAA, the University of Oxford or any test board. WHO IT'S FOR High school and university students in precalculus and calculus, anyone preparing for AP Calculus or AP Physics C, and anyone who learns better when an equation has a shape. FREE, FULL GAME AND PLUS The first 14 levels, the daily challenge and 3 hints a day are free. Unlock every level for good with the one-time Full Game purchase, or subscribe to First Principles Plus for every level, unlimited hints and a streak shield that forgives one missed day a week. Plus is a monthly or yearly auto-renewing subscription. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel them in your Apple Account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://github.com/rkaissi/First-Principles/blob/main/privacy-policy.md
Screenshots
Verdict
The clearest difference is ads: 1st Principle at none against Poor Bunny!'s shown. Poor Bunny!'s advantage is update cadence (every 3 weeks vs every 4 months). On price, in-app purchases, 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
Both are free to download. Poor Bunny! sells 1 one-off in-app purchase and 1st Principle sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
Poor Bunny! ships an update every 3 weeks, 1st Principle every 4 months. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.
| Parameter | Poor Bunny! | 1st Principle |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (2.7K ratings) — better | — |
| Positive reviews | 92.4% of reviews | — |
| Number of ratings | 2.7K — better | — |
| Update frequency | Every 3 weeks — better | Every 4 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15 | 15.0 |
| Further details — not scored | ||
| Size | 54 MB | 124 MB |
| Age rating | 12+ | 4+ |
| Developer | Jussi Simpanen | Wonmo Seong |
Bugs and requests
Poor Bunny!
Reported bugs
2 issues- Occasional crashes or freezes
- Difficulty in precisely jumping between platforms
Requested features
4 requests- Add online multiplayer mode
- Introduce new game modes or challenges
- Implement customizable controls
- Unlock additional map environments
1st Principle
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Poor Bunny!
- Remove Ads$1.99
1st Principle
- Plus, billed monthly$1.991 Month
- Plus, billed yearly$9.991 Year
- Unlock All Levels$4.99
Questions
Is Poor Bunny! free?
Is 1st Principle free?
Do Poor Bunny! or 1st Principle have ads?
Which is updated more often, Poor Bunny! or 1st Principle?
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