What are some good free biology apps for iphone ?

Go to the iTunes store, select App Store, and do an advanced search. You can check the box for free apps if you only want free apps.

Try Aqua Globs -- a game that looks like a cartoon version of something you'd see through a microscope.

There are also apps called:

iStudy MCAT Biology
iStudy Genetics
Biology:Homeostasis
Biology Reproduction
iSutdy MCAT Enzyme Biology
Oxford Dictionary of Biology
AA+ Biology Study Cards
Biology:MCAT
Biology Quiz
Molecules
Biology: Digestion
Mild EleMints Free Periodic Table
Science Glossary
Nervous System Anatomy
Artificial Life
10,000 Science Facts
KPCOFGS
Science Facts
AudioZoo: bird songs
Bryan Edwards Microbiology Flashcards
iAmino
Trees
The Circulatory System
Embryology
ScienceFacts Lite
BioFacts
101 Marine Science Facts
Encyclopedia of Life and
Field Buddy.

Maybe one of those will interest you. Hard to know what will float your boat. If you want tips on finding free and discounted apps read the attached article.

Source(s):

http://www.ehow.com/how_5263537_download-discounted-iphone-itouch-apps.html