Comparison

Addition・Subtraction Free vs 九九

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Addition・Subtraction Free

Features
Read full description

available(Free app) : A part of the flash cards or step game. Without using fingers, you will be able to add and subtract. There is individual variation. This application contains flash card-styled learning and pleasant game learning. You see tiles which represent a certain number in a card for flash card-styled learning, so you can visualize the numbers and rules for addition and subtraction. Make sure you read out equations loud when doing flash card learning. Reading out them loud leads to hear their sound, and it gives you the ability to calculate. The game learning is a mission game that you rescue a genie of the lamp. You will get various things and see something surprising in the process until you accomplish the mission. You can enjoy learning addition and subtraction through the game. Studying steadily with flash card exercises is the key point to do so well in the game learning. ■ Without using fingers, you will be able to add and subtract fluently. There is individual variation. If you adopt Afterimage Phenomenon and Method of Instinctive Calculation, you will be able to get the ability to calculate easily. ■ Learn using flash card-styled exercise Flash card-styled learning way: going through 4 steps per a problem. Flick cards like real ones or tap icons or turn over cards automatically when you turn over the flash cards. ■ You can learn “concept of numbers” in STEP 1 , “addition without regrouping” in STEP 2, “subtraction without regrouping” in STEP 3, “addition with regrouping” in STEP 4 and “subtraction without regrouping” in STEP 5. These 5 learning become basic of math study. To master this learning gives you self-confidence toward arithmetic. This method is particularly suitable for children in lower grades, in kindergartens and for those who take time to learn. available(Free app) : STEP1 , STEP2 ■ Can make sure that what kind of flash cards there are in every step on the list. ■ Can put marks on the front cover of the flash cards. ■ The order of the problems in the tests and in the games changes every time. ■ Delighted learning game is included in. A genie of the lamp is locked up in a box. To rescue him, you turn into another genie and have races with 3 different animals. Then you can collect 5 gold lamps through playing games. You can also see surprising scenes on the screen every time you get lamps. (you can collect 1 gold lamps on free app.) ■ By the step game,  you can select it among the three speed.     Once you set up the difficulty level and the speed of your opponent , you  can enjoy the game while you learn. Furthermore, you can check your exact  speed and scores.  target : preschool / nursery school / elementary school

About

九九

This app offers a comprehensive multiplication and word problem learning experience with randomized practice questions. It includes a review mode for incorrect answers and is free to use with optional ad removal via in-app purchase.

Highlights
  • Randomized multiplication problems
  • Word problem practice
  • Review mode for incorrect answers
  • Calendar feature
  • Name and icon display for submissions
Features
Read full description

-多くの教育機関でもご好評いただいています- 2.0 追加機能 カレンダー なまえとアイコンを表示できる機能(スクリーンショットで宿題を提出する際などにご活用ください 九九やかけ算の問題がたくさん詰まったアプリです。 問題はランダムで作成されるので、何度でも繰り返し学習できます。 間違った問題だけを集めた復習モードを搭載! 苦手な段の克服に役立ちます。 全て無料でお使いいただけます。 画面下部にバナー広告が挿入されます。 アプリ内購入でバナー広告を非表示にできます。

Screenshots

Addition・Subtraction Free4 screens
九九4 screens

Verdict

The call

The clearest difference is in-app purchases: Addition・Subtraction Free at none against 九九's 1. Addition・Subtraction Free also leads on ads (none vs shown) and iOS requirement (8.0 vs 12.0). On price, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. 九九 sells 1 one-off in-app purchase. Addition・Subtraction Free asks for nothing beyond the download.

UpkeepUpdate frequency

Addition・Subtraction Free ships an update every 4 months, 九九 every 5 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard3 real differences · 7 level
Addition・Subtraction Free versus 九九: the parameters behind the verdict, then further details
ParameterAddition・Subtraction Free九九
PriceFreeFree
Rating—2.5 (2 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 4 months — betterEvery 5 months
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better12.0
Further details — not scored
Size19 MB109 MB
Age rating4+4+
Developermmc Co., Ltd.Sumie Watanabe

In-app purchases

None

Addition・Subtraction Free

No in-app purchases

1 purchases

九九

One-time1
  • 九九アプリバナー広告非表示$1.99

Questions

Is Addition・Subtraction Free free?
Addition・Subtraction Free is free to download, with no in-app purchases.
Is 九九 free?
九九 is free to download, with in-app purchases available.
Do Addition・Subtraction Free or 九九 have ads?
九九 shows ads; Addition・Subtraction Free does not.
Which is updated more often, Addition・Subtraction Free or 九九?
Addition・Subtraction Free ships an update every 4 months, and 九九 every 5 months. Most recently, Addition・Subtraction Free was updated on November 1, 2026 and 九九 on November 3, 2026.

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