Karri vs Math Zombie Classic
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Karri
This app simplifies payments to schools and community organizations, eliminating the need for cash. It offers instant payments, reminders for upcoming events, and a secure digital wallet for easy transactions. The goal is to create safer environments by reducing cash handling.
- Instant payments via MasterCard/Visa
- Digital wallet for stored funds
- Payment reminders for events
- Add events to calendar
- Transaction history
- Manage multiple children's payments
- Pay for school items and fees
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Karri allows you to make safe, quick and convenient payments back to your school or other community organization. So far, we’ve removed millions of dollars of cash from schools in South Africa and Australia. Download the app, register an account (in less than 60 seconds), choose your preferred payment mechanism and make an instant payment back to your organization. Forget to pay? No problem. Karri will send you a friendly reminder so you or your child never miss an event/outing/fundraiser again. Help us remove cash from schools and community organizations making them a safer place for all. - Make an instant payment to your organization from your MasterCard or Visa - Store funds in your Karri wallet to make sure you never miss a payment again - Receive a convenient reminder if you forget about a payment - Add all events to your calendar, straight from the Karri app - No bank charges! Karri is completely free to use. Karri has made paying your school, church or sports club insanely fast and easy. - Check all your transactions on the Karri transaction history - Add your children to the app so you can make payments on their behalf - Pay for stationery, textbooks or school fees simply and easily from your Karri app. - Karri supports numerous payment types. Sports tours or ticket sales? No problem Download our free app to make payments and orders to your organization simple and hassle-free Download the Karri app for a secure mobile wallet, instant payments, instant orders and so much more! To make a payment, scan the QR code provided by your school and choose the amount. Alternatively, they may request (if you've given them permission) from you directly. Welcome to a world beyond cash in envelopes and painful bank transfers. Welcome to Karri.
Math Zombie Classic
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Strengthen math skills through fast, playful rounds. Math Zombie Classic: Learn is a number-combination puzzle that builds mental math, problem-solving, and quick thinking for learners of all ages. Reach the exact target number before time runs out, and every correct sum sends a friendly zombie back home. A target number appears at the top of the screen. Tap tiles to build the correct sum, watch them merge into your answer, and level up as the challenges grow. Eight cute zombie friends wander the garden above the board. Each target you hit sends one back into the soil, and each new level brings another one out. This game supports skill development across mental arithmetic, pattern recognition, memory, and speed. Adaptive difficulty keeps learners challenged at the right level, which makes it a great fit for students, parents, teachers, and adults who want a focused brain-training routine. Features: • Strengthens mental math and number fluency • Fast-paced challenges that improve focus and memory • Color-coded tiles that support number recognition • Eight friendly zombies that react to every correct answer • Adaptive progression that scales as players improve • Endless play, ideal for daily warm-ups • Zen mode with a slower timer for relaxed practice • Scoring bonuses for using more tiles and matching colors • Bright, classroom-friendly visuals Perfect for students practicing math fundamentals, adults keeping their minds sharp, educators looking for warm-up activities, and anyone who enjoys quick, skill-building puzzles. Download Math Zombie Classic: Learn and sharpen your math skills one round at a time.
Screenshots
Verdict
The clearest difference is in-app purchases: Karri at none against Math Zombie Classic's 1. Karri also leads on ads (none vs shown) and update cadence (every 5 weeks vs every 10 months). On price, 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. Math Zombie Classic sells 1 one-off in-app purchase. Karri asks for nothing beyond the download.
Karri ships an update every 5 weeks, Math Zombie Classic every 10 months. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.
| Parameter | Karri | Math Zombie Classic |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (227 ratings) — better | — |
| Positive reviews | 91.3% of reviews | — |
| Number of ratings | 227 — better | — |
| Update frequency | Every 5 weeks — better | Every 10 months |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 65 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Education Payment Solutions (Pty) Ltd | MM&F Software LLC |
Bugs and requests
Karri
Reported bugs
10 issues- Links for help don't work
- No support available
- Timing of some messages inappropriate (early Sunday morning)
- Bank cards not linked for overseas users
- Payments missing
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- Constant error issues
- Cannot see calendar/transactions, cannot sign out
- App not secure (potential fraud)
- Payments going missing/delayed
- Notifications not dismissible
Requested features
11 requests- More health or snack options in food menu
- Menu changes every other week
- Small pizzas, borewos rolls, ice cream, steak pies, donuts, muffins, brownies, fruit salad options
- Video tutorial on common problems
- Basket of items for simultaneous payment
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- Option to buy single items or combo packs
- Kid-friendly chip flavors (spicy, salsa, sour cream & onion)
- Ability to dismiss notifications
- List of paid/unpaid learners for teachers
- Dark mode option
- Advanced analytics dashboard
Math Zombie Classic
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Karri
No in-app purchases
Math Zombie Classic
- Math Zombie Class PRO$0.99
Questions
Is Karri free?
Is Math Zombie Classic free?
Do Karri or Math Zombie Classic have ads?
Which is updated more often, Karri or Math Zombie Classic?
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