The congratulatory conversation contained few of the problematic requests that a later July phone call did. But it did show Trump eager to engage Volodymyr Zelensky, whom he would later ask to investigate his political rivals.
"When you're settled in and ready, I'd like to invite you to the White House. We'll have a lot of things to talk about, but we're with you all the way," Trump said in the April call.
The release of the transcript came a month-and-a-half after Trump first promised to make it public. He told reporters in September he was eager to release it, believing it would bolster his claims of innocence as an impeachment inquiry was speeding up.
Indeed, the call contains mostly pleasantries from Trump and Zelensky about the recent Ukrainian election.
"I think you will do a great job. I have many friends in Ukraine who know you and like you," Trump said. "I have many friends from Ukraine and they think -- frankly -- expected you to win. And it' s really an amazing thing that you've done."
The tone is friendlier than the July conversation, during which Trump asked Zelensky to launch investigations into the Bidens and the 2016 election.
After Zelensky praises the Ukrainian people, Trump mentions his onetime ownership of the Miss Universe franchise.
"When I owned Miss Universe, they always had great people. Ukraine was always very well represented," Trump said.
And when Zelensky invites Trump to his inauguration, Trump says he'll dispatch someone at "a very, very high level." Vice President Mike Pence was originally tapped to attend, but later was replaced by Energy Secretary Rick Perry at Trump's behest.
There is a notable omission.
Trump never mentions corruption, despite an official White House readout distributed at the time saying Trump expressed a commitment to working together to "root out corruption."
And the classification markings reflect a difference in how the April and July calls were handled. The first call was marked "Unclassified" and "for official use only." The second call was classified as "Secret."
After concerns were raised about the July call, White House lawyers ordered the transcript be placed in a highly classified server to avoid leaks.
The April document, which has been circulating in the White House, has been the subject of debate over the last month. Internal disputes, political maneuvering and diplomatic differences complicated its rollout, people familiar with the matter said.
Trump first raised the prospect of releasing the log of an April phone call with Zelensky on September 25, insisting it would help reenforce his innocence in the then-nascent impeachment crisis. He said at the time that Pence's phone conversations should also be made public.
Ever since, White House advisers have debated the wisdom of releasing additional conversations with Zelensky after a transcript of Trump's July phone call failed to quiet allegations he was pressuring Ukraine to investigate his political rivals.
Trump said last weekend he would probably release the transcript on Tuesday. Tuesday came and went, and he announced on Wednesday the transcript would be released Thursday.
On Thursday morning, a White House official said timing of the release was "up in the air."
Even though the additional phone calls are not seen as troubling inside the White House, some officials view releasing any additional information as risky. They believe Democrats will find a way to weaponize the transcripts, and are wary of providing any more fuel to the impeachment fire. And even some officials not aligned with Trump see a dangerous precedent in releasing transcripts of a president's conversations with foreign leaders.