FourTrack

I'm obsessed with this FourTrack recording app - a superpowerful studio in your pocket. I can record basically anywhere. Anastasio (Phish) in Rolling Stone Magazine

FourTrack Features:

* Multitrack recording: use bounce for more than 4 tracks (eg. 8, 12, 16 tracks or more)
* 16 bit, 44.1 kHz recording quality
* Pan Control: move tracks from left to right
* Timeline: seek to anywhere in a song instantly
* Latency Compensation: accurate to within 1ms
* Compressor-Limiter: fattens sound of output mix
* Bounce: mix song to track 1 and 2 of a new song to record as many tracks as you want
* Metronome: select tempo by number or tapping. Record along with real drums, including beats by celebrity drummer Jason McGerr
* Wi-Fi sync to a computer & import into any recording software
* Wi-Fi sync to RiffWorks T4 free to add effects, mix to WAV or OGG, post to RiffWorld.com for an MP3, capture pain and gain settings and more
* MasterFX: sweeten the sound of your recordings with a compressor-limiter and a 4-band parametric EQ
* AudioPaste: paste audio from compatible AudioCopy apps including InstantDrummer, DopplerPad, VOX 3000, Reverb, Equalizer, Compressor, BassLine, Looptastic, and more
* PromoTracks: download individual PromoTracks from a variety of artists directly into a FourTrack song to add more tracks, mixdown with effects, export and more.

Videos, Guide, FAQ, Forum and more on sonomawireworks.com

Requires headphones and a microphone or a headset.

The 88 recorded Love is the Thing, using this FourTrack multitrack recorder on an iPhone. The tune was recorded with a total of 16 tracks. The 88 used the iPhone mic for each instrument, plus four-part harmony - displayed on their making of video on YouTube. - USA Today

Solid and functional, well worth $10. Stable, easy and useful - Wired.com

Developers:
Sonoma Wire Works, makers of RiffWorks
Retronyms, makers Recorder and DopplerPad