Numzi vs Muzz
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Numzi
Easily convert numbers into memorable words and vice versa using a phonetic code. This tool helps you remember credit card numbers, phone numbers, dates, and more, making daily life simpler. It includes a comprehensive offline dictionary for enhanced memory recall.
- Number to word conversion
- Word to number conversion
- Offline dictionary
- Mnemonic Major System
- Peg System integration
- Pronunciation included
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Never forget a number. Numzi provides the easiest way to convert numbers into memorable words. Also, Numzi is bi-directional, so you can also use Numzi to convert your words back into your number. Remember credit card numbers, phone numbers, Social Security numbers, dates, or even remember your parking lot number. Numzi can help you remember the many numbers you deal with daily, which can make life easier. Numzi is fully portable word / number dictionary that includes word pronunciation. The word / number dictionary works offline and covers the English language with over 220,000 words and over 90,000 unique numbers. Numzi uses a phonetic code known as the mnemonic Major System to convert numbers into words. The mnemonic Major System method associates numbers 0 through 9 to a specific consonant sound. Using the mnemonic Major System, you can turn the number 735 into “camel" by inserting vowels among the consonants since we know K="7", M="3" and L="5", so “camel" --> K ae M ah L --> 735. If you choose to learn the mnemonic Major System, you can easily convert your Numzi-words in your head, or if you prefer, you can simply use the Numzi App to retrieve your number. The usefulness of the mnemonic Major System goes beyond the ability to remember numbers. You can also combine this method with the Peg System, to help memorize a numbered list, such as a grocery list or the presidents of the United States, by associating numbers with words easily visualized such as “shoe," “ray", or “home." The Numzi Peg Word list includes a Peg Word Story to help you remember the peg words. Combining the Major System with the corresponding phonetic Peg Word list system helps improve your memory using the same methods as the world memory champions. Numzi is a fun, handy word / number dictionary tool to help give your number-memory a boost. Never forget a number again!
Muzz
Analyze audio signals with 21 different spectrum analyzers. Visualize fundamental frequencies, harmonics, and feedback for both beginners and experts. Supports loading audio files or using live microphone input.
- 21 spectrum analyzer types
- Load audio files
- Live audio mode
- Dark and light modes
- Peak enhancer
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Muzz is a professional-grade real-time spectrum analyzer built for audio technicians, acoustic engineers, musicians, and sound enthusiasts. Whether you're diagnosing room acoustics, analyzing live microphone input, inspecting harmonics and feedback, or studying the frequency characteristics of any audio signal — Muzz gives you the tools to see exactly what you're hearing. 21 spectrum graph types, from standard linear analyzers to advanced harmonic alignment and octave-aligned displays, give you flexibility no single visualization tool can match. NEW IN 1.0.8 — Live frequency axis: Hz markers (100–8kHz) displayed permanently along the bottom of every visualization — Long press anywhere on the visualization to pin the exact frequency at that point for 2 seconds — Continuous background audio: Muzz now keeps analyzing when your screen locks or you switch apps — critical for live monitoring sessions — CarPlay compatible: enabling the microphone no longer interrupts audio playing through your car system — Frequency labels adapt automatically to dark and light mode Core Features — Load any audio file and visualize its full spectrum in real time — Live analysis mode via device microphone — ideal for room acoustics, stage monitoring, and field work — Persistent Hz frequency axis on every visualization — Long press to inspect exact frequencies at any point on the spectrum — Peak enhancer: isolates spectral lines (harmonics, fundamentals) and suppresses percussive noise — Toggle visualization variants to explore alternative display modes — Gain and treble controls to calibrate the display to your signal level — Dark and light mode with automatic label color adaptation — Runs continuously in the background — no interruptions during live sessions 21 Spectrum Graph Types Bars Extended Bars Short Line Spectrum Music Spectrum Linear OAS Overlapped Octaves Octave Aligned Spectrum Elliptical OAS Spiral OAS Harmonic Alignment TriOct Spectrum Overlapped Harmonics Harmonograph Cymbal Rainbow Spectrum Waterfall Rainbow OAS Rainbow Ellipse Spinning Ellipse Out of the Rabbit Hole Down the Rabbit Hole For in-depth theory on each spectrum type, tap the info icon to access the full Visualizations Guide. Questions, bug reports, or feature ideas — we want to hear from you: amitnadir@gmail.com
Screenshots
Verdict
The clearest difference is review sentiment: Numzi at 80% against Muzz's 29%. Numzi also leads on rating (4.4 vs 1.0) and price ($4.99 vs $12.99). Muzz's advantage is device support (4 vs 2). On update cadence, ads, in-app purchases and monetization model 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
Numzi costs $4.99 and Muzz $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Numzi holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: Numzi has 13 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 80% of Numzi's written reviews are positive against 29% of Muzz's.
Numzi ships an update every 11 days, Muzz fortnightly. The most recent releases landed on August 15, 2026 and September 18, 2026 respectively.
| Parameter | Numzi | Muzz |
|---|---|---|
| Price | $4.99 — better | $12.99 |
| Rating | 4.4 (13 ratings) — better | 1.0 (2 ratings) |
| Positive reviews | 80.0% of reviews — better | 28.6% of reviews |
| Number of ratings | 13 — better | 2 |
| Update frequency | Every 11 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #200 — better | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 13 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Stephen Scott | Amit Nadir |
Customer experience
Numzi
Muzz
In-app purchases
Numzi
No in-app purchases
Muzz
No in-app purchases









