What is the crowd's opinion of Open Data Kit?

From 3.5 billion comments

Come and help us work on [Open Data Kit (ODK)](http://opendatakit.org)! ODK is a set of tools for mobile data collection (think SurveyMonkey, but offline first, and crazy powerful). We have millions of users with do-gooder projects in every country. Over the last decade, ODK projects have generated hundreds of millions of submissions with critical data. Some examples:

• Much of the data guiding World Health Organization’s polio eradication efforts in Afghanistan, Nigeria, and Pakistan is collected with ODK.
• London School of Hygiene & Tropical Medicine is measuring the efficacy of the Ebola vaccine in the ongoing outbreak in Democratic Republic of the Congo with ODK
• The Carter Center uses ODK to get the real-time data needed to assess elections. Over the last six years, ODK has been used to monitor elections in Liberia, Egypt, Libya, Kenya, Nepal, the Democratic Republic of Congo, Mozambique, and Tunisia.
• Hutan Aceh in Indonesia is home to tigers, elephants, orangutans and rhinos. Local activists protect it by documenting forest crimes with ODK. The geo-tagged forms, rich with photos, provide the evidence needed to save habitat.

If $6/user/month is out of your price range then I'm guessing you need pro-bono work. First try contacting someone at ODK and see if a free app that meets your needs hasn't already been developed and distributed:

http://opendatakit.org/about/

Tons of contact leads there. I wouldn't be surprised if someone knows of or has built an app that could at least get you started.

Also, fwiw it doesn't sound like you have to build your own relational database with ODK. And if you did, there's also SQLLite built into Android to consider