What screenshot inputs are required?

Clean simulator captures in PNG format are required. The studio composites each capture into the chosen device frame and applies your typography, layout and theme.

Can a project be saved and resumed later?

Yes. Authenticated users can save projects to the cloud, name them, and open them again from any device. Autosave runs every 30 seconds during an active session and uploads only the screenshot bytes that have actually changed. The Free tier supports one saved project; the Pro tier supports twenty.

Is the export compatible with fastlane?

Yes. The export bundle uses the exact directory layout expected by fastlane deliver and supply, including locale and device folders. iOS and Google Play screenshots may be mixed within a single bundle without further reorganisation.

Can multiple device sizes be rendered together?

Yes. Any combination of iOS 6.9, 6.7, 6.5 and Google Play may be selected. A single render produces every selected size and packages them in one bundle.

How customisable is the typography?

Each project supports an arbitrary number of named text fields. Within each field, individual character spans may be styled with their own font, size, weight, colour, italics, underline and alignment. More than 30 Google Fonts are available out of the box.

Where is data stored?

Render output and project assets are stored in Cloudflare R2 under the European Union jurisdiction (primary copy in Western Europe). Accounts, render history, and billing data sit in Postgres on a Contabo VPS in Düsseldorf, EU. Render outputs are removed after 24 hours; screenshots associated with saved projects are retained for the lifetime of the project. No training is performed on customer data, and the studio interface uses no tracking cookies.

api · for builders

Ship store screenshots from CI.

One HTTPS endpoint. Multipart upload, JSON status poll, signed zip download. No SDK lock-in. Drop it into a GitHub Action, a Fastlane lane, or a cron — every release ships with fresh, multilingual store assets.

see quickstart →create a key pricing

auth

One header, one key

Send X-API-Key. Plaintext shown once at create time, sha256 at rest. Revoke instantly from the dashboard — no token refresh, no OAuth dance.

queue

FIFO queue, no 409s

Hammer the endpoint from a matrix build. Submissions are persisted, the worker pulls them in order. Polling shows progress; submitter never blocks.

idempotency

Safe retries

Pass Idempotency-Key once and the same job comes back on every retry within 24 hours. Survives flaky CI runners and dropped connections without double-billing render time.

i18n

Up to 15 locales / call

Send per-locale captions in one request and the renderer fans them out across iOS 6.9 / 6.7 / 6.5 / Play. Output zip is fastlane- or framework-shaped on demand.

translate

Auto-translate, self-hosted

POST /v1/translate to fan out source copy into every locale you ship. Backed by our own LibreTranslate instance — no third-party MT service, no data hand-off, results cached for free repeats. Pro only.

two minutes from key to zip

# 1. POST your shots
curl https://api.appscreen.co/v1/render \
  -H "X-API-Key: $APPSCREEN_KEY" \
  -F 'theme=paper' \
  -F 'sizes=["ios-6.9"]' \
  -F 'langs=["en","de","tr"]' \
  -F 'screens=@./shot1.png' \
  -F 'screens=@./shot2.png'
# → { "jobId": "…", "status": "queued" }

# 2. Poll until done
curl https://api.appscreen.co/v1/render/$JOB \
  -H "X-API-Key: $APPSCREEN_KEY"
# → { "status": "done", "downloadUrl": "https://api.appscreen.co/r/…" }

# 3. Pull the zip
curl -o screens.zip "$DOWNLOAD_URL"

drop into a fastlane lane

# Fastfile
lane :appscreen do
  job = sh(%(
    curl -fsS https://api.appscreen.co/v1/render \
      -H "X-API-Key: $APPSCREEN_KEY" \
      -F 'theme=paper' \
      -F 'sizes=["ios-6.9","ios-6.7"]' \
      -F 'langs=["en","de","tr"]' \
      -F 'screens=@fastlane/screenshots/shot1.png' \
      -F 'screens=@fastlane/screenshots/shot2.png'
  )).strip
  job_id = JSON.parse(job).fetch("jobId")

  loop do
    sleep 5
    res = JSON.parse(sh("curl -fsS https://api.appscreen.co/v1/render/#{job_id} -H 'X-API-Key: $APPSCREEN_KEY'"))
    break if res["status"] == "done"
    UI.user_error!(res["error"]) if res["status"] == "failed"
  end

  sh("curl -fsSL -o fastlane/appscreen.zip '#{res["downloadUrl"]}' && unzip -o fastlane/appscreen.zip -d fastlane/screenshots")
  deliver(skip_metadata: true, skip_app_version_update: true)
end

Bundle layout matches fastlane deliver and fastlane supply — locale and device folders, no reshuffle.

limits

200 screens / job
500 renders / month (Pro)
30 requests / minute / key
20 min server-side timeout
10 MB / file
1 hr download URL TTL

Need higher caps, outbound webhooks, or per-render billing? Drop a line at hello@appscreen.co — these are on the roadmap and we ship the first request that asks for them.