For indie iOS and Mac developers
The toolkit for shipping apps on your own
We design, build and polish our own Mac and iPhone apps by hand, and test every screen on real devices. These are the tools and App Store data we use along the way, grouped by the stage you are at. The browser tools upload nothing.
Build
The everyday helpers while you write the app: data formats, tokens, IDs, dates, colours and icons.
- Privacy manifest generatorGenerate and check PrivacyInfo.xcprivacy with Apple's reason codes.
- App icon generator for XcodeMake an Xcode AppIcon set from one 1024 px picture.
- Provisioning profile viewerRead a provisioning profile: type, expiry, entitlements, devices, certificates.
- IPA inspectorLook inside an .ipa: Info.plist, privacy manifests, profile, architectures, size.
- String Catalog translation progressSee per-language translation progress of a String Catalog and export what is missing.
- AASA validatorValidate your universal-links file and test which URLs open the app.
- JSON formatter and validatorFind the exact line and column of a bad API response.
- JSON to TypeScriptInterfaces, JSON Schema or Zod from a sample payload.
- JWT decoderRead claims and expiry, and check the signature with your key.
- Regex testerLive matches, capture groups and replace previews.
- Unix timestamp converterTimestamps to dates in any time zone, units detected.
- UUID generator and checkerv4 or time-ordered v7, up to 1000 at once.
- Hash generatorSHA-256 and friends for text or a file, with HMAC.
- Base64 encoder and decoderText and files, URL-safe output, exact error positions.
- Cron expression explainerPlain-language schedules and the next 10 run times.
- Colour converterHEX, RGB, HSL, OKLCH and more, with shades.
- Colour contrast checkerWCAG AA and AAA, and the nearest colour that passes.
- SVG to PNG converterExport artwork at 1x to 4x or an exact pixel size.
- Text diff checkerCompare two files and copy a unified diff.
- CyberChef500+ encode, decode and analysis operations in one page.
Ship
Getting the listing, screenshots, preview video and landing page ready for the App Store.
- App Review rejection guidesWhat each common rejection means and how we fixed it, from our own submissions.
- Apple developer updatesOS and Xcode releases and App Review Guidelines changes, checked every 30 minutes.
- App Store metadata checkerName, subtitle and keyword limits, wasted keywords and price words that get listings rejected.
- App Store screenshot sizesEvery accepted size, a check for alpha channels, and resizing to the size Apple wants.
- App preview video checkerLength, resolution, frame rate, size and sound checked against Apple's specs.
- Character counterCheck name, subtitle and description copy against a character limit.
- Image resizerResize up to 20 screenshots to exact pixels at once.
- Aspect ratio calculatorFind the missing side and a screen's PPI.
- Trim videoCut a screen recording down to the frame for a preview video.
- Video compressorGet an MP4 or MOV under a size you choose.
- Meta tag generatorTitle, description and social cards for the app's website.
- Schema markup generatorJSON-LD structured data for the landing page.
- QR code generatorA code for your App Store link, as SVG or PNG.
Grow
App Store data gathered daily: where apps rank, what is climbing, what users ask for and complain about.
- App Store rank checkerWhere any app places in the top charts, by country and category.
- Rising appsApps that climbed the charts over the last week, small developers first.
- Indie cornerSmall and solo developers: who charts, who is loved, who is new.
- OpportunitiesWhich topics are in demand and still thinly served.
- What reviewers complain aboutThe most common complaints in 1- and 2-star reviews, by topic.
- Moving to subscriptionsCharting apps that went from paid to free or announced a subscription.
Run
The money side of a one-person app business: prices across currencies, tax, margins and break-even.
- App Store commission calculatorEstimate your App Store proceeds after tax and Apple's commission.
- Subscription metrics calculatorMRR, churn and LTV for your subscription app, net of Apple's share.
- Currency converterOne price in several of 160+ currencies at once.
- Historical exchange ratesWhat a payout was worth on a past date.
- VAT and sales tax calculatorTake tax out of a tax-inclusive store price.
- Margin and markup calculatorCost, price, margin or markup from any two.
- Break-even calculatorHow many sales cover your fixed costs.
- Time zone converterSee a release time in up to 8 cities at once.