building in public on instagram: a reel a day, in order

the short version

building in public on instagram works when you treat it as a series, not a stream of updates. one short portrait video whenever you have an episode, numbered in order, captions burned in, a cover that reads in the grid, and a caption written from what you actually said.

reels are where video on instagram reaches people who don't follow you yet. stories are for the people who already do. carousels are for the rare day with a screen worth reading slowly. most of the work is the reel.

what kills it is not the platform. it is the overhead: deciding what to say, filming, editing, writing the caption, every time. take those jobs away and posting takes a minute.

why building in public on instagram means reels

a photo of your desk with a paragraph under it reaches the people who already follow you. on day one that is mostly friends and family, who are kind and not your audience.

reels are recommended to people outside your followers. that is the whole reason to be on instagram with a build: it is one of the few places a stranger can find episode 3 of something they have never heard of.

video also carries what a build actually is. a text card that says "shipped v2" tells people what happened. thirty seconds of you saying it tells them how it went: whether it was a relief, whether you are worried, whether you are already onto the next problem. that is the part people come back for.

and the audience for a build is serial. someone who saw episode 12 wants to know how 13 went. reels sit on your profile in order, so a new viewer can scroll back, and the number on the front tells them where they are.

reels, stories or carousels: which for a build?

all three have a job. they are not the same job.

underway makes the reel and can post it. stories and carousels are yours to make by hand in the instagram app. for most builds, sharing the reel into your story on the day it goes out is all the story work there needs to be.

what a good building in public reel looks like

• portrait, filmed that way. a landscape clip in a portrait feed wastes most of the screen.
• captions burned in. a lot of people scroll with the sound off, and captions make the first seconds readable without it.
• the number on it. "episode 47" in the corner tells a stranger this is a series and tells a follower where they are.
• a first line that names its subject. "the signup emails stopped sending on tuesday" works for someone arriving cold. "so yeah, it broke again" does not.
• one thread. one thing that happened, what was at stake, how it went. a packed day crammed into a minute is unwatchable.
• the same look every time. same card, same captions, same corner. someone who sees episode 12 and episode 40 should know it is you before they read a word.
• a length someone will finish. most episodes land between one and three minutes, and instagram takes reels up to three.

the cover still matters in the grid

when someone lands on your profile they see the grid before any video plays. each reel's cover is a still, and a row of them is your series at a glance. a grid of random mid-blink frames reads as a feed. a grid with the same layout on every tile reads as a show.

• use a real frame of you with a few of your own words across it, or your title card. both are honest.
• keep the words in the middle. the profile grid crops the cover, so words near the top or bottom get cut off.
• put the episode number on it. it is the cheapest way to say "this is part of something".
• never a generated illustration. a made-up picture in front of a real diary is the wrong promise, and people notice.
• pick the layout once. a series that redesigns its covers every month has a weaker look than one that never touches it.

in underway the cover is made on the cards tab of the episode: a frame of you or the title card, with a line from the episode across it. suggest other words offers different lines you said, use this cover keeps it, and save the image downloads it. a portrait episode has one cover for everywhere. a landscape episode shows a second, portrait cover marked tiktok · instagram, and that is the one instagram gets.

the caption and hashtags, written from what you said

the caption carries what the video can't: which episode this is, what happened in plain words, why a stranger should care, and who it is for. then a few hashtags on the last line. a handful of specific ones, #buildinpublic and your own field, beats thirty generic ones.

underway writes one caption shared by instagram and tiktok from the transcript of the episode, with the hashtags on its last line. it follows the same outline as every post it writes: a line that places the episode, a reason to care, what happened, a short list of what else it covers, and who it is for. there is nothing in it you didn't say. no number you never gave, no outcome that didn't happen.

read it before it goes and change anything in the box; it saves as you type. read it properly, because instagram does not let an app change a reel's caption once it is up.

how to build in public on instagram without a second job

the reason most instagram build logs stop in week two is that each post is four jobs. here is the version with one job in it.

• film once, whenever suits you. underway asks the questions out loud, about the day you actually had, and aims for about three minutes of answers, never past five. no script, no intro to camera.
• let it cut. your answers stay in the order you said them, the filler and false starts come out, the card goes on the front, captions go on, and a small made with underway sits in the corner.
• check the cover on the cards tab.
• read the caption on the share tab.
• press post to instagram. it goes up as a reel with the portrait cover you saved, and view on instagram appears once the link is confirmed.
• share it to your story if you want your followers to see it today.

posting from the episode page needs a professional instagram account (creator or business) and the series plan. on the founder plan the caption is on the episode to copy; download the file and post it in the instagram app yourself. either way nothing is posted on its own. every post is a press you made, on an episode you watched.

what to avoid

• hooks that break chronology. opening on the best line from minute two and then going back works once. in a series it makes every episode feel produced, and it trains you to film for the clip instead of the day. the person who came back for episode 48 wants to know what happened, in the order it happened.
• trending audio over your voice. your voice is the content. music belongs under a monthly round-up, not under an episode.
• day numbers. "day 47" after a missed week is either a visible gap or a lie. count episodes instead; episode 47 is honest whenever it was filmed.
• a backfill dump. forty old clips on one afternoon confuses anyone who follows you, and recency is most of how a feed ranks. if you filmed in private first, launch with one post pointing at the whole run.
• chasing your best reel. comparing each reel with your best one makes you film for the numbers. look at the total instead: how many episodes, how many people reached, none of it there before you started.
• pretending it's finished. the reason anyone watches a build is that it isn't.

a "previously" is different from a hook. one line from the last episode, in your own words, to set up what was at stake, is a chapter opening. underway can open every episode that way if you turn it on once.

how often to post reels about your build

as often as you film, at whatever rhythm you can keep. weekdays is a sensible default; three a week is fine; a week off is fine. the number carries on regardless, because it counts episodes and not days. in underway the streak counts against the commitment you chose, not the calendar, and one tap pauses it without a reason asked.

what matters more than frequency is that it keeps going. a small series that is still running in month six is worth more than a burst of daily reels that stopped in week three.

faqs

where to go next

the same series on youtube, with shorts, a weekly recap and a playlist: /how-to-build-in-public-on-youtube.

how often to post, and what to do after a gap: /how-often-to-post-when-building-in-public.

why the number on the front counts episodes, not days: /why-count-episodes-not-days.