Comparison

Bacteria Music vs ChoirXML

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

Head to head
About

Bacteria Music

Features
Read full description

Make gross, gooey, squelchy music! Bacteria Music is a simple, playful beat maker. Tap the glowing bacteria to build a loop, twist the knobs to make it wetter and grosser, and mash Change Bass and Change Beats to discover new sounds with different drum kits and endless squelchy basslines. When you make something you love, share a clip with a friend in a tap. - Tap-to-play grid with fun ripples and haptics - Wobbly, farty acid-style bass - 12 drum kits, from boomy to bright to lo-fi - Change the bass and the beat independently - Share your creations - No accounts, no ads, nothing saved or collected...just play! Perfect for kids and the young at heart. Made by Soundtron Studios.

About

ChoirXML

Transform printed sheet music into an editable digital format. Convert PDFs, scans, or photos into MusicXML, allowing playback, transposition, and sharing with notation apps. All processing is done locally on your device.

Highlights
  • Import sheet music from PDF, images, or camera
  • Automatic page straightening
  • Recognizes notes, rests, dynamics, and lyrics
  • Editable score with bar-by-bar correction
  • Playback with piano and choir sounds
  • Export to MusicXML for notation apps
  • On-device processing for privacy
Features
Read full description

ChoirXML reads printed choral scores and turns them into MusicXML – the file every common notation app can open. An old sheet, a scan or a photo becomes an editable score you can listen to, transpose, re-engrave or share with your choir. IMPORT • PDF or image from Files, a photo from your library, or scan with the camera • several pages into one song • pages are straightened automatically • choose the kind of score or let ChoirXML tell: choir, piano, choir with piano, instrumental RECOGNITION • staves, clefs, key and time signatures, including changes along the way • notes and rests down to sixteenths, dots, triplets, chords and several voices per staff • ties, slurs, fermatas, multi-bar rests and pickup bars • lyrics with several verses – even when printed once for all voices • dynamics (pp to ff), crescendo and diminuendo hairpins, accents, staccato, tenuto and breath marks • chord symbols above the notes • pale, grey photocopies too CHECK AND CORRECT Your original on top, the recognised music below – bar by bar in the same place. Only what was uncertain is marked in red, and ChoirXML asks exactly about it: Is the length right? Is the pitch right? Does this syllable belong to this note? A loupe shows that spot of the original. • tap a note to change pitch, length, accidental, voice or expression • delete single notes of a chord • insert missing notes for one voice or for both – also onto the stem of a note where the voice divides • insert missing bar lines, set or remove a pickup bar • confirm a voice that sings only a few notes of its own right where they stand • assign a syllable by tapping its note • set clefs, keys, time signatures, slurs, fermatas, final bars and repeats • undo and redo every change LISTEN Play back what was recognised before you share it: with a recorded grand piano and a choir sound, the singing voices as a choir or as a piano. The sounding notes light up, and you set the tempo. EXPORT MusicXML with all voices, verses, markings and chord symbols – with one staff per voice (soprano, alto, tenor, bass, each with its own sound and part in your notation app) or like a piano score on two staves. Save it to Files or share it straight to your notation app. PRIVATE Everything happens on your iPad. No account, no subscription, no ads, no data collection. Your music leaves the device only when you share it. GOOD TO KNOW Recognition works best with cleanly printed music. Handwriting, smudged copies or very dense scores need more corrections – ChoirXML shows you exactly where. Please respect the rights to the music you scan.

Screenshots

Bacteria Music3 screens
ChoirXML4 screens

Verdict

The call

The clearest difference is update cadence: Bacteria Music at every 2 days against ChoirXML's every 6 days. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Bacteria Music ships an update every 2 days, ChoirXML every 6 days. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

Scorecard1 real difference · 8 level
Bacteria Music versus ChoirXML: the parameters behind the verdict, then further details
ParameterBacteria MusicChoirXML
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 2 days — betterEvery 6 days
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size3 MB13 MB
Age rating4+4+
DeveloperSoundtron Studios LLCJonathan Froese

In-app purchases

None

Bacteria Music

No in-app purchases

None

ChoirXML

No in-app purchases

Questions

Is Bacteria Music free?
Bacteria Music is free to download, with no in-app purchases.
Is ChoirXML free?
ChoirXML is free to download, with no in-app purchases.
Do Bacteria Music or ChoirXML have ads?
Neither Bacteria Music nor ChoirXML shows ads.
Which is updated more often, Bacteria Music or ChoirXML?
Bacteria Music ships an update every 2 days, and ChoirXML every 6 days. Most recently, Bacteria Music was updated on October 31, 2026 and ChoirXML on November 6, 2026.

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