5.0on the App Store

Your personal AI picks the shots that hit, puts them in the right order, writes the caption, and finds the song.

Free to try · iPhone · iOS 15.1+ · No signup

How it works

Three steps. Thirty seconds.

No signup, no learning curve. Open the app and you’re one upload away from a finished dump.

Step 01

Drop your photos

Up to 12 shots from the day, the trip, whatever. No signup, no menu of options.

Step 02

Wait 30 seconds

PostCheck rates every frame, picks the winners, sequences them, and pairs a caption + song.

Step 03

Post it

Grab the finished set. Copy the caption. Add the song. Done.

Real output

Captions that don’t sound like a robot wrote them.

Nine registers, matched to what’s actually in your photos. These are real ones.

Lowkeysalt in everythingFunnysunscreen was a suggestionConfidentwater was cold, sent itNostalgicsame lake, same crewSubtle Flexprivate beach, no notesMysteriousyou had to be thereGirls Nightthe girls found the sunFor the Boyscooler was full, mostlyCleanblue water, that's itFunnyseagull took my chipsLowkeysalt in everythingFunnysunscreen was a suggestionConfidentwater was cold, sent itNostalgicsame lake, same crewSubtle Flexprivate beach, no notesMysteriousyou had to be thereGirls Nightthe girls found the sunFor the Boyscooler was full, mostlyCleanblue water, that's itFunnyseagull took my chips
Confidenttan lines earnedMysteriousphone stayed in the bagNostalgicsummers we keep coming backSubtle Flexboat picked us upLowkeyquiet one they saidFunnywho ordered the shotsFor the Boysthe boys are backCleanout past midnightGirls Nightnobody wanted to leaveConfidentshowed up showed outConfidenttan lines earnedMysteriousphone stayed in the bagNostalgicsummers we keep coming backSubtle Flexboat picked us upLowkeyquiet one they saidFunnywho ordered the shotsFor the Boysthe boys are backCleanout past midnightGirls Nightnobody wanted to leaveConfidentshowed up showed out
Personal AI

The dump only you would post.

Most AI apps send your photos off and hand back whatever comes out. This one watches what you do with the result. Which caption you copy, which songs you replay, which of its cuts you overrule. All of it goes into the next run as instructions, and none of it leaves your phone.

1
It scores every photo on its own

Each frame gets a mark and a reason. The order you uploaded them in is ignored completely, because you picked a camera roll, not a running order.

2
It cuts what repeats

Near-duplicates and the frames that do not earn a place come out. Six strong photos beat twelve where four are the same shot.

3
It picks the opener first

The first slide decides whether anyone swipes, so the strongest frame leads and the rest are built around that choice.

4
Then it paces the rest

Sequenced so it does not spend everything up front, with something worth reaching at the end.

Your taste profile
What PostCheck has learned
LEARNING
Song taste
Indie · guitar58%
Hip-hop · slow42%
Caption register
Lowkey64%
Confident27%
Funny9%
What it tracks
Captions you copyArtists you replaySong vibes you previewCuts you overrulePhotos you restoreOrders you changeSongs already suggestedDumps you save
Updated after every dumpOn-device signals
Under the hood

Craft you can feel.

Every app says it uses AI. Here is the specific version of that, so you can judge it against anything else you have tried.

The read

It looks at every photo you give it.

A frontier vision model reads the actual contents of every frame. Who’s in it, what’s happening, whether it’s sharp. It reads the set twice: once to score and order the photos, again to read the mood of the whole day, because the song that fits a ski trip doesn’t fit a dinner.

·Scores every frame·Picks the opener·Cuts near-duplicates·Sequences for pacing·Writes the caption·Matches the song
Yours only

What it learns never leaves your phone.

The profile it builds about your taste is stored in the app on your device, not on a server, and there is no account it could be attached to. Your photos are sent encrypted to be read, then discarded.

The song

Picked from a real bank, not invented.

Models are bad at naming songs that actually exist, so the vibe it detects is matched against a curated bank of real tracks. Ask for another and it pulls from the same bank, and never repeats one it already gave you.

The obvious questions

Fair. Here’s the real answer.

You can. Most people don't, though. They send a few to the group chat and wait for someone to weigh in. PostCheck gives you that second opinion right away, without three friends picking three different favorites. It reads every shot and hands back a ranked, ordered dump you can post.
Your photos are sent over an encrypted connection to be analyzed, then discarded. We never store them. The finished write-up is held briefly so a repeat run is instant, but never the images themselves. No face recognition, no ads, and nothing from your camera roll is used to train AI models.
Instagram carousels are the main use case. The pick, order, caption, and song all work anywhere you post a photo set.
About 30 seconds from upload to finished dump. Long enough to open a beer, short enough that you'll forget you used it.
Yes to all three. PostCheck reads the actual content of your photos, not a fixed template. Snowboard trip, birthday dinner, coffee shop day, festival weekend. It adjusts to whatever you shot.
Swap anything you want. PostCheck gives you a starting point that's better than blank; you stay in control. The more you use it, the better it reads your taste.
The yearly plan starts with a free trial, so your first dump costs nothing. Cancel in App Store settings before it ends and you're never charged. After that it's $29.99 a year, or $4.99 a month if you'd rather go month to month. Both are unlimited checks. There's no account to create either. You never sign up for anything.

Post the one you meant to post.

Free to try. No signup. Thirty seconds from your camera roll to something worth posting.

Free to try · iPhone · iOS 15.1+ · No signup