13 vs Abacus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
13
A Halloween-themed shape puzzle game designed for young children to learn counting through interactive play. It features intuitive puzzles, animated toys, and mini-games to keep kids engaged while practicing one-to-one correspondence.
- Halloween-themed puzzles
- Counting practice with 1-to-1 correspondence
- Intuitive shape matching
- Animated toys upon completion
- Two mini-games: Find the number and Memory cards
- Engaging and fun learning experience
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For young kids starting to learn count and their parents who are fond of Halloween. Let your little one to learn count while playing with fun Halloween toys. Just a simple shape puzzle game, loved by any kid... plus the toys are counted out loud in English! +++ LEARNING BASE: the app is designed to give young kids the very idea of counting. The process is based on 1-to-1 correspondence; also it is involving and fun. +++ INTUITIVE: each new puzzle falls to pieces itself first, so that your kid realizes at once what to do! +++ ENGAGEMENT and FUN: every time when the puzzle is completed successfully the Magic of Halloween brings the toys to life; it does so in so many different ways that your little one will never be bored with seeing the same things! +++ PRACTICE: it is SO fun that your kid is likely to practice it over and over again just to see what happens next, picking up counting just in play! +++ 2 mini-games between series of puzzles: Find the number and Memory cards. This app is a variation of our successful app 123 Count With Me, this time - with the true Halloween Magic. Try it for free up to 3. Upgrade to 13 (in-app purchase) not only brings more exercises, but adds also more toys, more fun and more magic! We used pieces from our ABC Magnetic Board in this app.
Abacus
This educational app combines ancient calculation wisdom with modern technology. It features a beautiful interface with large beads, supports decimal points and negative numbers, and offers multilingual support for a fun and engaging learning experience.
- Beautiful interface with large beads
- Support for decimal points and negative numbers
- 21-column abacus
- Multilingual support (19 languages)
- Interactive calculation examples
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WHEN ANCIENT WISDOM MEETS MODERN TECHNOLOGY ! BEAUTIFUL INTERFACE with COMFORT & BIG BEADS ! SUPPORT DECIMAL POINT & NEGATIVE NUMBERS ! 21-COLUMN ABACUS CAN SPEAK ! • LANGUAGES: ENGLISH JAPANESE RUSSIAN CHINESE ARABIC GERMAN FRENCH SPANISH KOREAN NORWEGIAN FINNISH CANTONESE DANISH PORTUGUESE SWEDISH INDONESIAN TURKISH DUTCH VIETNAMESE • LET'S USE ABACUS TO CALCULATE AND HAVE FUN ! 2+2+2+2+2+2+2+2+2+2 = 20 30-3-3-3-3-3-3-3-3-3-3 = 0 1+2+3+4+5+6+7+...+98+99+100 = 5050
Screenshots
Verdict
The clearest difference is price: 13 at Free against Abacus's $2.99. 13 also leads on update cadence (every 3 months vs every 9 months) and iOS requirement (5.1.1 vs 15.6). Abacus's advantage is in-app purchases (none vs 2) and review sentiment (15% vs 0%). On ads 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
13 is free to download; Abacus costs $2.99 up front. 13 sells 2 one-off in-app purchases. Abacus asks for nothing beyond the download.
13 ships an update every 3 months, Abacus every 9 months. The most recent releases landed on June 5, 2026 and September 4, 2026 respectively.
| Parameter | 13 | Abacus |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 3.0 (3 ratings) — better | — |
| Positive reviews | 0.0% of reviews | 15.4% of reviews — better |
| Number of ratings | 3 — better | — |
| Update frequency | Every 3 months — better | Every 9 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 5.1.1 — better | 15.6 |
| Further details — not scored | ||
| Size | 142 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Tatiana Churanova | 俊 姜 |
Customer experience
13
Abacus
In-app purchases
13
- More Languages$0.99
- Full Version$1.99
Abacus
No in-app purchases









