NumericTadpole vs isfizz
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NumericTadpole
Create MIDI data for music production using a numeric interface. This app allows you to input note position, pitch, length, and velocity to generate musical sequences for other applications. It does not produce sound itself, requiring an external sound module.
- Numeric data input for notes
- Adjustable note position, length, and velocity
- MIDI data generation
- Table and data views
- Song and track management
- 16 tracks available
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This is a music sequencer using numeric data. This app is for making MIDI data to send to an another app applied to virtual MIDI. This app doesn't have any sound generation. You have to choose a destination sound module on the setting page. The modules applied to virtual MIDI are listed in MIDI setting page. If you don't select any module, the default sound module is selected by OS. Data are four elements, position, note, length, and velocity. Position shows the time a note start at. Position is displayed in two ways, MEASURE / BEAT / TICK or MEASURE / TICK. The resolution of a beat is 48. Note is pitch.(0-127) Note is displayed in two ways, number (60) or name (C4). Length shows how long a note continues. Length is displayed in two ways, BEAT / TICK or TICK. The resolution of a beat is 48. Velocity shows how strong note is.(0-127) You can change how to display on setting page. Table view: you can see data in the graphic table. Data view: you can see and control numeric data. The view shows position, note, length, velocity from left to right. Direction: you can move the focus cell to up, down, right or left. Ins/Del: you can insert or delete a note. Number: you can enter numbers to a focused cell or increase/decrease a focused number. Play: you can play or stop the song. you can choose to play all tracks or only focused track. Song tab: you can change a song, enter a song name, change the tempo of a song. Track tab: you can change a track, see and change some track parameters. 16 tracks are prepared. Setting: pops up the setting page.
isfizz
This app plays SFZ files, an open format for sampled sound instruments. It supports various audio file formats, MIDI, and Scala tuning files. It also functions as an Audio Unit Extension (AUv3) for use with other music apps.
- SFZ file playback
- Audio Unit Extension (AUv3) support
- Edit SFZ strings
- Load SFZ files in place
- Scala tuning file support
- MIDI support
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isfizz is a SFZ file player. SFZ is an open text format for sampled sound instruments. This app can load SFZ and play the instrument. - Includes Audio Unit Extension (AUv3). - You can edit SFZ string. - The app loads SFZ files in place without copying the files. - Double tap to enter the value, triple tap to reset. - Supports Scala tuning files (.scl). - Supports MIDI. - Supports 16 out. use the "output=N" opcode in SFZ. Supported sample file format: - .wav (raw PCM) - .aiff - .mp3 - .flac - .ogg (vorbis) - .wv (wavpack) This app is an iPhone/iPad port of sfizz-ui project. The app is made from some sfizz-ui codes and images. About half of the income from this app will be donated to SFZ Tools team. This app and the description contain machine translated text.
Screenshots
Verdict
The clearest difference is review sentiment: isfizz at 100% against NumericTadpole's 0%. isfizz also leads on update cadence (fortnightly vs every 2 months) and ratings volume (14 vs 1). NumericTadpole's advantage is rating (5.0 vs 4.7). On price, 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
NumericTadpole costs $2.99 and isfizz $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
NumericTadpole holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: isfizz has 14 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 0% of NumericTadpole's written reviews are positive against 100% of isfizz's, so the app with the better star average is not the one people write more warmly about.
NumericTadpole ships an update every 2 months, isfizz fortnightly. The most recent releases landed on August 12, 2026 and October 9, 2026 respectively.
| Parameter | NumericTadpole | isfizz |
|---|---|---|
| Price | $2.99 | $2.99 |
| Rating | 5.0 (1 ratings) — better | 4.7 (14 ratings) |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 14 — better |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.5 | 15.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Motonari Hibi | Ryouta Kira |
Customer experience
NumericTadpole
isfizz
In-app purchases
NumericTadpole
No in-app purchases
isfizz
No in-app purchases
