Aperi app iconAPERI

For the person behind the camera

Your phone is the viewfinder.

Your Sony camera's live view on your phone, with a coach that reads the frame and tells you why the shot isn't working.

iPhone and Android · free while in beta

Live view, tap to focus, the coach, hands-free with a headset, USB-C and Wi-Fi: the same on iPhone and Android. The Apple Watch remote is iPhone only.

Shifen Waterfall in Aperi's live view, with exposure controls and the coach's reply about the photograph beneath
01 / Measured on real hardware

Fast

From a press to a picture. From a question to a voice. Here is what we measured, and how.

Apple Watch · iPhone

Press the shutter on your wrist, see the shot on your wrist.

0.9–1.5 s

From the wrist press to the picture on the watch.

Sony A7 V over Wi-Fi Direct, iPhone locked in a pocket, measured over three shots (1,526 / 1,444 / 941 ms).

The camera's autofocus is the largest fixed cost.

Aperi on Apple Watch showing a waterfall photograph, with shutter, How's this? and microphone buttons below
A shot, seconds after the wrist press: shutter, "How's this?", mic.

AirPods · Any headset

Double-press the earbud, hear the coach.

2.5 s

From the press to the first spoken word. Any earbuds with a next-track button do the same, on iPhone and Android.

Best measured run, Aperi coach over Wi-Fi Direct with the phone on 5G, ; typical runs 3.3–4.2 s. A7 V, phone locked, RAW-only card.

That includes the shot, the upload and the model. Nothing is pre-rendered.

From the app

Tap the sparkle on the phone, hear the answer.

4.2 s

Press to first spoken word over USB-C.

Measured , 251-character answer.

Numbers are from the engineering log on real hardware, phone locked where it says so. Your network and lens will move them.

02 / In your hands

Screens

Frame it. Ask about it. Keep shooting.

Aperi's live view framing a waterfall with a grid, histogram and exposure controls
01Frame the shot on your phone.
A waterfall frame staged for the coach with a typed question beneath it
02Add a question before you send.
The coach's answer in the conversation sheet, below the question and recorded camera settings
03Read the answer in the conversation.
Shifen Waterfall in Aperi's live view, with the coach's reply below the shutter and exposure chips
04Keep the reply beside your controls.
Aperi in landscape, with a Taiwan night street photograph on the left and shutter, exposure, conversation and question controls on the right
05Turn the phone and work from the rail beside the picture.

Real captures of the app. The three phone walkthrough screens were taken on an iPhone; the others use the app's demo camera fed with our own photographs, and the coaching shown is what the app actually said about them. You can try the demo camera before connecting your own.

03 / Your camera, your setup

Ways to use it

The phone is the brain every time. What you hold, wear or plug in decides how you ask and where the answer comes out.

Line drawing of a phone in hand, framing a waterfall while the camera sits on a tripod
01Phone in hand: frame, focus and shoot from the screen, then one button sends the last shot to the coach and reads the answer back.
Line drawing of a photographer with AirPods in, camera to the eye and phone in a pocket
02Phone in a pocket, earbuds in: double-press to coach the last shot or single-press to ask in your own words, with the answer in your ears and the screen off.
Line drawing of an Apple Watch showing a shot with a focus bracket and an orange button
03On the wrist (iPhone): every shot appears as it is taken, with a shutter, ask button and mic, and the answer spoken by the watch or your AirPods if they are in.
Line drawing of a camera and phone joined by a wireless signal, with no cable
04No cable at all: use the camera's own Wi-Fi in the field or your home network, and the phone can stay locked the whole time.
04 / A second pair of eyes

The coach

Aperi never touches your photograph. It doesn't generate images, retouch them, or edit anything. It reads the frame you're composing and the settings you're using, and tells you what it sees, the way an instructor looking over your shoulder would. The shot stays entirely yours.

Why not just ask ChatGPT?

You can, after the fact: export the photo, upload it, type in what you shot it at. Aperi is on the camera while you shoot. It reads shutter, aperture, ISO and focus mode straight from the body, so it never guesses the exposure from pixels. It answers in seconds about the frame in front of you, not the one from last week. And with earbuds in or the watch on, you never take your eye off the scene. A chatbot is a fair critic of a finished picture. This is a coach for the next one.

Two real sessions

Both of these happened. The coaching quoted is what the app actually replied to the first frame in each pair, written before the second photograph existed and checkable against the EXIF.

Shifen Waterfall: moving water

Shifen Waterfall with the water frozen into messy strands
Before 1/50s · f/8 · ISO 100 · 18mm
Shifen Waterfall with the water rendered as smooth silk by a long exposure
After 1/2s · f/22 · ISO 100 · 18mm
The coach

The main issue is your shutter speed of 1/50. It is in a no-mans-land for moving water, making the falls look messy rather than intentional.

To get that classic, silky water, switch to Manual mode, keep ISO 100, and close down to f/16 to force a longer shutter speed, aiming for 1/2 or slower. You will need a tripod.

You either freeze water completely at 1/1000 or paint with it at 1 second. Let us slow it down.

The advice named 1/2 of a second; the next frame was shot at exactly that. Both on the same 18mm prime and ISO 100, so three stops of aperture bought the slower shutter. The framing changed too: APS-C crop mode was switched on and the tripod moved a step closer, so the water is not the only difference you are looking at.

Night street, Taiwan: where the colour lives

Neon-lit street at night, the signs bright to the point of blowing out
Before A · 1/125s · f/1.8 · ISO 800
The same street exposed a stop darker, the neon signs holding their colour
After M · 1/60s · f/2.8 · ISO 400
The coach

Your brightest highlights, like those blue and white neon signs, are completely blown out.

In night street photography, colour lives in the highlights. Because you are in A mode at exposure compensation 0, the camera is trying to make the dark asphalt neutral, which overexposes the signs.

Dial your exposure compensation down to -1.3 EV. This will protect those rich neon colours and clean up your shadows.

Let the darkness frame your light.

The advice asked for about a stop and a third less exposure; the frames measure 0.99 EV darker. The camera also moved to Manual, which stopped auto-ISO wandering between 800 and 3200 from one frame to the next, and stopping down to f/2.8 put more of the street in focus. It is meant to be darker. That is where the neon gets its colour back.

05 / Compatibility

Cameras

The honest list, because nothing is more annoying than installing an app that turns out not to see your camera.

06 / What it costs

Pricing

The beta is free. This is the plan for after it, so nobody joins without knowing what comes next.

Camera control

Free forever

  • Live view, tap to focus, remote shutter
  • Shutter, aperture, ISO and EV from the phone
  • Histogram, grids, highlight clipping
  • Card browser
  • No account, no key, no subscription

A small banner sits on the settings and chat sheets, never over the picture. $4.99 once removes it.

Aperi coach, monthly

$4.99 / month

  • The same 300 replies a month
  • Cancel any time

Works out to $59.88 a year.

These are the prices we intend to charge when the beta ends. They are not live in either store yet, and nobody is charged today. Prices in US dollars; store taxes may apply.

07 / Questions

Questions people ask

The short answers. The long ones are in the sections above.

Does it work with my Sony camera?

The A7 V is tested on real hardware before every release, over USB-C and Wi-Fi. The A7 IV, A7R V, A7C II, A1 II, A9 III, A6700 and ZV-E1 share the same protocol generation and should work, but we have not had one in hand. If you own one of those, you are exactly the tester we want.

How fast is the coaching?

Measured, not estimated: 0.9–1.5 seconds from a wrist press to the picture on the watch; 2.5 seconds on the best run from an earbud double-press to the first spoken word, 3.3–4.2 seconds typically; 4.2 seconds from a tap in the app over USB-C. Your network and lens move those numbers.

Do I need an API key?

No. The coach works the moment you open the app on Aperi's own key. If you would rather use your own key from Google, Anthropic or OpenAI, you can, and it stays on your phone.

Is it really free?

Every camera feature is free forever: live view, tap to focus, the remote shutter, exposure, the histogram and grids, the card browser. During the beta the coach is free too: 10 replies every 24 hours on our key, or unlimited on your own key.

What happens after the beta?

Camera control stays free. The coach becomes a subscription, $4.99 a month or $39.99 a year for 300 replies a month, and a $4.99 one-time purchase removes the banner. Your own key stays free and unlimited. Testers move to the store version when it ships; nothing is lost.

Does it work without internet?

The camera side does: USB-C and the camera's own Wi-Fi Direct need no internet at all. The coach does need a connection, because the frame goes to the AI provider either way.

What about Canon and Nikon?

Coming, no date yet. Canon uses its own PTP extensions, so it is real work rather than a switch to flip; Nikon follows Canon.

Can I try it without a camera?

Yes. The app opens on a built-in demo camera, marked with a green DEMO badge, and everything except the physical link works exactly as it does with real hardware, coach included.

08 / Come shoot with us

Beta

The coach works the moment you open the app — no API key, no account. 10 free coach replies every 24 hours, on us. If you would rather use your own key from Google, Anthropic or OpenAI, you can: it stays on your phone, your photos go straight to the provider you chose, and it is free and unlimited. Everything else — live view, focus, exposure, the card browser — never needed either. What each provider does with your photographs →

Every camera feature — live view, focus, exposure, the card browser — is free forever, no account, no key. Only the coach has a paid tier, and the prices are on this page.

TestFlight and Google Play · free while in beta

Joined so far: 20 iPhone testers, counted 21 September 2026. The Android count follows once the Play track is serving installs.

Testers with a Sony body other than the A7 V are especially welcome.