"Cinema FV-5" (lots of manual controls, pretty much a FilmicPro equivalent, some features like exposure lock are only applicable for certain devices), "A Better Camera"
"KineMaster" (very good UI, almost as good as iMovie and Pinnacle Studio, in some regards even better: real audio ducking with keyframes, basic in-app grading, trim-to-playhead command, timeline markers ... 2nd video tracked was promised by developers for one of the next updates. Big bummer: KM introduced a subscription service with quite a hefty price tag, about 4 Euros a month, 30 per year. One can use the app for free but export has watermark. KM only runs on relatively powerful phones, there's a detailed list on their website.
Alternatives: "Power Director", "Video Pad" (tablet-only!)
"Camera FV-5", "A Better Camera"
"Pixlr Express", "PicsArt Studio", "Snapseed", "Photoshop Touch"
"Field Recorder" (very good, only app that allows for flipping of the UI to still have important controls in reach when using a smartphone with bottom mic that is covered with a wind screen, very responsive developer. No in-app editing though)
"Rec Forge Pro" / "Rec Forge II" (reliable, easy to use, in-app editing of clip)
"Lexis Audio Editor"
Audio Editing (Multi-track):
"Audio Evolution Mobile" (very professional and feature-rich DAW, easy to use, top-notch. Some features not really important for Journos but one doesn't have to use them so it doesn't matter)
Thanks to @Florian for these!