Add Up Fast vs Instrument Sounds
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Add Up Fast
Test your mental math skills with quick, 15-second challenges. Tap the correct answer to progressively harder equations to boost your brain power. Features four distinct game modes for varied practice.
- 15-second speed challenges
- Tap correct answer mechanic
- Progressively harder questions
- Addition mode
- Subtraction mode
- Multiplication mode
- Division mode
Read full descriptionHide full description
15 seconds of speed math to boost your brain power. The rules are simple: Tap the right answer for the equation. Players have 15 seconds to get as many questions right as possible. The questions get progressively hard as more questions appears. 4 GAME MODES: ------------------------------ 1) Addition 2) Subtraction 3) Multiplication 4) Division
Instrument Sounds
Explore over 100 musical instruments with high-quality audio and engaging quizzes. Learn about their history and cultural significance through an easy-to-use interface. Perfect for music lovers of all levels.
- Over 100 instruments
- High-quality audio
- Interactive quizzes
- Instrument history and culture
- User-friendly interface
- Beginner and enthusiast friendly
Read full descriptionHide full description
Welcome to "Instrument Sound: Learn & Quiz" – your musical exploration hub! Immerse yourself in over 100 instruments across Strings, Percussion, Keyboards, and Brass/Wind. Enjoy interactive quizzes for a fun and educational experience. Discover Melodies: Explore a diverse array of instruments, each brought to life with top-notch audio quality for an authentic sonic experience. Engaging Learning: Challenge yourself with interactive quizzes, perfect for both beginners and enthusiasts, making learning music enjoyable. User-Friendly Interface: Navigate effortlessly through a user-friendly interface, uncovering insights about each instrument's history and cultural significance. Download Now: Embark on a melodic journey. Download "Instrument Sound: Learn & Quiz" to enrich your appreciation for the world of music. --- Chào mừng đến với "Âm Thanh Nhạc Cụ: Học và Kiểm Tra" – nơi khám phá âm nhạc của bạn bắt đầu! Dạo chơi trong hơn 100 nhạc cụ thuộc các loại Dây, Gõ, Bàn Phím, và Đồng/Ghi-ta. Thưởng thức các bài kiểm tra tương tác để có một trải nghiệm vui nhộn và giáo dục. Khám Phá Âm Thanh: Khám phá đa dạng của các nhạc cụ, mỗi cái được tái tạo với chất lượng âm thanh cao cấp để mang lại trải nghiệm âm thanh chân thực. Học Tập Thú Vị: Thách thức bản thân với các bài kiểm tra tương tác, phù hợp cho cả người mới học và những người yêu nhạc, giúp việc học âm nhạc trở nên thú vị. Giao Diện Dễ Sử Dụng: Dễ dàng điều hướng qua giao diện thân thiện với người dùng, khám phá thông tin chi tiết về lịch sử và ý nghĩa văn hóa của từng nhạc cụ. Tải Ngay: Bắt đầu hành trình âm nhạc của bạn. Tải "Âm Thanh Nhạc Cụ: Học và Kiểm Tra" ngay để làm phong phú sự hiểu biết về thế giới âm nhạc của bạn.
Screenshots
Verdict
The clearest difference is review sentiment: Add Up Fast at 58% against Instrument Sounds's 0%. Add Up Fast also leads on rating (3.8 vs 3.0) and ratings volume (75 vs 4). Instrument Sounds's advantage is in-app purchases (none vs 3) and update cadence (every 6 weeks vs every 38 months). On price, ads 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
Both are free to download. Add Up Fast sells 3 one-off in-app purchases. Instrument Sounds asks for nothing beyond the download.
Add Up Fast holds the better App Store score, 3.8 against 3.0. That said, the two scores are not equally well evidenced: Add Up Fast has 75 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 58% of Add Up Fast's written reviews are positive against 0% of Instrument Sounds's.
Add Up Fast ships an update every 38 months, Instrument Sounds every 6 weeks. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.
| Parameter | Add Up Fast | Instrument Sounds |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (75 ratings) — better | 3.0 (4 ratings) |
| Positive reviews | 58.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 75 — better | 4 |
| Update frequency | Every 38 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 12 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Arch Square | Bang Vu |
Customer experience
Add Up Fast
Instrument Sounds
In-app purchases
Add Up Fast
- Pack of 250 Tokens$0.99
- Pack to Unlock All Game Modes$1.99
- Pack to Remove Ads$1.99
Instrument Sounds
No in-app purchases
Questions
Is Add Up Fast free?
Is Instrument Sounds free?
Which has better reviews, Add Up Fast or Instrument Sounds?
Do Add Up Fast or Instrument Sounds have ads?
Which is updated more often, Add Up Fast or Instrument Sounds?
Other comparisons
