What happens if there is no formal agreement between two app developers
<p>Suppose two people, A and B, developed an ios app together doing equal amounts of work.</p>
<p>Suppose that they don't have any written agreements and never registered a company. A registered himself as an individual developer instead of a company on Apple's store, and he linked his bank account with the app. He transfers half the profit he receives for the app to B's bank account.</p>
<p>Out of curiosity I wonder what their legal rights and responsibilities would be. If the app becomes very successful some day, can A claim full ownership and keep all the profits? On the flip side, if there are any lawsuits will B be legally liable alongside A?</p>
<p>I'm curious to know answers from any jurisdiction.</p>

<p>In copyright law, such an app is a joint work, and each developer is a co-author. Either may use or license the work, but any profits are jointly owned, and in the absence of any specific agreement to the contrary, must be split equally.</p>
<p>If one co-author is marketing the work, and sharing the proceeds equally with the othe co-author, s/he is acting legally and there are no legal grounds for complaint,</p>
<p>A may not lawfully claim the entire work or all the profits, unless B agrees to give or sell the rights to A. Such a deal would need to be in writing under US law.</p>
<p>Either A or B could sell his or her rights (or some part of them) to a third party, or leave them by will or inheritance. Thew rights will last until 70 years after the death of whichever author is last to die in the US and many other countries, from 50 to 100 years after in various others. (It is unlikely that an app would still have monetary value nearly that long.)</p>
<p>Nonetheless it would be wise to draft and sign a written agreement, particularly if there is any chance of the app becoming popular enough to create substantial profits.</p>
<p>There is no need to form a company (although there can be advantages to doing that). But a clear agreement on ownership shares (particularly if they are to be anything other than equal), rights, and division of profits, could avoid later trouble. If the consent of both co-authors for granting a license is to be required, an agreement would be needed to impose that rule. The default rule is that either co-author may act on behalf of both (and when there are more than two co-authors, any one may act on behalf of all).</p>
<p>If it was claimed that the work infringes someone else's copyright or patent, both co-authors would be liable in the absence of any agreement to the contrary. In a lawsuit over licensing or marketing, only those who were party to the deal would normally be liable. I can't think what other kind of suit over such an app would be at all likely.</p>

<p>A and B have undertaken a joint enterprise with an intent to profit, which means they have created a partnership. The app is owned by the partnership, which is a distinct legal entity, even in the absence of any written agreement or government filings.</p>
<p>Partnership laws vary from one jurisdiction to the next, but the general rule in common-law jurisdictions (pretty much all of the English-speaking world) is that in the absence of an agreement otherwise, profits and losses are divided equally.</p>
<p>In the event of a lawsuit, the partners are jointly and severally liable, meaning that a plaintiff can extract any judgment from one or both of the partners, as he pleases.</p>

contract-law intellectual-property internet software liability