Hi all, Don't know if I'm the only dinosaur here who doesn't know that things like that exists, but I've been wanting to do quick and easy tempo changes on my mp3 player for ages. Came across 2 apps for the iphone/ipad, and thought I'd share them with everyone. 1. iLift - iliftapp.com 2. Amazing Slow Downer Lite - ronimusic.com I took a quick look at both of them and decided to give a very brief and biased review of them. And since I am El Cheapo, I'm only going to compare the free lite versions of the apps... lol The similarities: 1. Both have pitch lock, if you just want to change tempo. 2. Both have key adjustments too if you wanna do that. 3. Both changes tempo by sliding a percentage bar. (Alas, I'm still waiting for something else that has song ID tags so I can just say "play me this song at 32mpm"!) 4. Both are equally annoying to upload songs to. They don't access your ipod library. Instead you have to upload songs one by one through wi-fi. The process is painless enough though, it's more of just a nuisance. 5. Both can loop sections of a song, play, rewind, or search a song by dragging the knob thingy to the time desired. 6. I believe you can add notes to songs for both of them The differences: 1. iLift lets you upload 3 songs free, and use the 3 songs fully. If you want different songs, you have to delete a current one. ASDL lets you upload however many you want I think, but the program limits it to playing the first 1/4 of each song. (The iLift Pro is $9.99, available through in app purchase. The ASD is available for $14.99. Both will let you upload unlimited number of songs and whatever else, if any, they let you do.) 2. iLift changes tempo from 50 to 150%. ASDL changes tempo from 33% to 200%. 3. iLift has a sexier interface. 4. ASDL doesn't have a fast forward button. 5. ASDL seems to allow greater control... Besides the tempo, iLite has a key change (only in semitones) and a "fine tune" (apparently for out of tune recordings), and ability to change song ID tags. ASDL does mix, pitch (looks like not just semitones), stereo, quality, and other random stuff. Ambiguous: I know ADSL allows you to sort songs by title, artist, etc. Not sure about iLift. For my purposes: I went with iLift. All I need it to do is change tempo on some songs so the kids on my dance team can catch up if the music is too fast for their abilities... who needs things like adjustable EQ anyway? And I take 3 full songs over many quarter-songs. I have a Samba, Jive, and Cha uploaded now... maybe I'll reconsider my choice when we start Viennese... or download both. If you are a musician/audiophile wanting to do other funky stuff though, ASDL may be your better bet. Have fun playing, I certainly did! And if anyone knows anything better than these apps, please let me know!