# go ka > Seven small iPhone apps by go ka: a countdown widget, an AI trip planner, an invoice maker, a calorie counter, a QR code maker, a vocabulary app and a workout tracker. > Every app has its own page here; the features, free parts and prices written on it > are what the app actually does. - Home: https://goka-xi.vercel.app/ - All apps on the App Store: https://apps.apple.com/developer/id1854274317 - Contact: qinqiangji@gmail.com ## Apps ### BeforeGo: AI Itinerary Planner An AI itinerary planner for iPhone that turns a travel post, link or note into a day-by-day trip plan, and writes the packing list from your destination and dates. - Page: https://goka-xi.vercel.app/beforego/ - Page (de): https://goka-xi.vercel.app/beforego/de/ - Page (fr): https://goka-xi.vercel.app/beforego/fr/ - Page (it): https://goka-xi.vercel.app/beforego/it/ - Page (es): https://goka-xi.vercel.app/beforego/es/ - Page (es-MX): https://goka-xi.vercel.app/beforego/es-mx/ - Page (pt-BR): https://goka-xi.vercel.app/beforego/pt-br/ - Page (ja): https://goka-xi.vercel.app/beforego/ja/ - Page (ko): https://goka-xi.vercel.app/beforego/ko/ - Page (zh-Hans): https://goka-xi.vercel.app/beforego/zh-hans/ - Page (zh-Hant): https://goka-xi.vercel.app/beforego/zh-hant/ - Page (th): https://goka-xi.vercel.app/beforego/th/ - App Store: https://apps.apple.com/app/id6786561175 - Platform: iOS (iPhone, iPad) - Category: Travel - For: People who plan trips from other people's posts and guides, and pack from memory. - Free: Free to start — no ads, no account required. Premium unlocks everything; a one-time lifetime purchase is also available. ### Countdown Widget: Any Event A countdown widget app for iPhone where every widget size is free and the number of events is unlimited. - Page: https://goka-xi.vercel.app/countdown/ - Page (pt-BR): https://goka-xi.vercel.app/countdown/pt-br/ - Page (de): https://goka-xi.vercel.app/countdown/de/ - Page (fr): https://goka-xi.vercel.app/countdown/fr/ - Page (it): https://goka-xi.vercel.app/countdown/it/ - Page (ja): https://goka-xi.vercel.app/countdown/ja/ - Page (ko): https://goka-xi.vercel.app/countdown/ko/ - Page (th): https://goka-xi.vercel.app/countdown/th/ - Page (zh-Hans): https://goka-xi.vercel.app/countdown/zh-hans/ - Page (zh-Hant): https://goka-xi.vercel.app/countdown/zh-hant/ - App Store: https://apps.apple.com/app/id6799846628 - Platform: iOS (iPhone, iPad) - Category: Productivity - For: Anyone counting down to a trip, wedding, exam, birthday or due date — or counting up from one. - Free: Every widget size, unlimited events, reminders, repeats, count-up, daily on-device backup, iCloud sync. - Paid: Pro unlocks 90 of the 122 backdrops. US$9.99/year with a 7-day free trial, US$1.49/month, or US$14.99 once for Lifetime. ### Smart Invoice & Estimate Maker An iPhone invoice app that makes invoices, estimates and receipts as PDFs, with a scan-to-pay QR code on the invoice. - Page: https://goka-xi.vercel.app/invoiceqr/ - Page (de): https://goka-xi.vercel.app/invoiceqr/de/ - Page (fr): https://goka-xi.vercel.app/invoiceqr/fr/ - Page (it): https://goka-xi.vercel.app/invoiceqr/it/ - Page (es): https://goka-xi.vercel.app/invoiceqr/es/ - Page (es-MX): https://goka-xi.vercel.app/invoiceqr/es-mx/ - Page (pt-BR): https://goka-xi.vercel.app/invoiceqr/pt-br/ - Page (ja): https://goka-xi.vercel.app/invoiceqr/ja/ - Page (ko): https://goka-xi.vercel.app/invoiceqr/ko/ - Page (zh-Hant): https://goka-xi.vercel.app/invoiceqr/zh-hant/ - Page (th): https://goka-xi.vercel.app/invoiceqr/th/ - App Store: https://apps.apple.com/app/id6790383156 - Platform: iOS (iPhone, iPad) - Category: Business - For: Freelancers, contractors and small businesses who bill from their phone rather than a desktop accounting suite. - Free: Three documents a month (invoices, estimates and quotes share the allowance), and four of the ready-made QR designs. ### DailyCalorie: Calories Left An AI photo calorie counter for iPhone that shows what you can still eat today rather than what you already ate. - Page: https://goka-xi.vercel.app/dailycalorie/ - App Store: https://apps.apple.com/app/id6798095407 - Platform: iOS (iPhone, iPad) - Category: Health & Fitness - For: People who quit other calorie apps because logging every item by hand was too slow. - Free: Manual logging, the daily window, and a limited number of photo scans. ### Custom QR Code Maker & Scan An iPhone QR code generator and scanner that lets you style a code with colours, shapes and a logo without breaking it. - Page: https://goka-xi.vercel.app/qrcodestudio/ - App Store: https://apps.apple.com/app/id6799589471 - Platform: iOS (iPhone, iPad) - Category: Utilities - For: Anyone putting a QR code on a menu, poster, business card or shop window and wanting it to look like it belongs there. - Free: Generating and scanning codes, and the standard styles. ### 单词兽-拍照学单词·小学初中英语闯关 把课本单词表变成闯关任务的 iPhone 背单词 app，学完一组解锁一只单词兽。 - Page: https://goka-xi.vercel.app/citu/ - App Store: https://apps.apple.com/app/id6796596826 - Platform: iOS (iPhone, iPad) - Category: Education - For: 需要背课本单词表的中小学生和家长。 - Free: 核心课程、闯关和收集，无需注册。 ### Repdex: Gym Workout Tracker A gym workout log for iPhone. - Page: https://goka-xi.vercel.app/repdex/ - App Store: https://apps.apple.com/app/id6803828068 - Platform: iOS (iPhone, iPad) - Category: Health & Fitness - For: People logging strength training sessions. ## Free tools & guides - [Days until calculator](https://goka-xi.vercel.app/tools/days-until/) — Free days-until calculator: type a date and get the exact number of days, weeks and the weekday. No sign-up. Link to your countdown to share it. - [How many days until Christmas 2026?](https://goka-xi.vercel.app/tools/days-until-christmas/) — Christmas Day 2026 is on Friday, 25 December 2026. Live countdown in days and weeks, plus a free Home Screen widget for your iPhone. - [How many days until Halloween 2026?](https://goka-xi.vercel.app/tools/days-until-halloween/) — Halloween 2026 is on Saturday, 31 October 2026. Live countdown in days and weeks, plus a free Home Screen widget for your iPhone. - [How many days until New Year 2027?](https://goka-xi.vercel.app/tools/days-until-new-year/) — New Year's Day 2027 is on Friday, 1 January 2027; New Year's Eve is Thursday, 31 December 2026. Live countdown plus a free iPhone widget. - [Quantos dias faltam para o ENEM 2026?](https://goka-xi.vercel.app/tools/pt-br/dias-para-o-enem-2026/) — As provas do ENEM 2026 são em 8 e 15 de novembro de 2026 (Edital nº 64 do Inep). Contagem regressiva ao vivo e widget grátis para a tela de início do iPhone. - [Quantos dias faltam para o Réveillon 2027?](https://goka-xi.vercel.app/tools/pt-br/contagem-regressiva-reveillon-2027/) — Réveillon: quinta-feira, 31 de dezembro de 2026. Carnaval 2027: de sábado 6 a terça 9 de fevereiro. Contagem regressiva ao vivo e widget grátis para o iPhone. - [Free invoice template](https://goka-xi.vercel.app/tools/invoice-template/) — A free invoice template you fill in on the page: your details, the client, line items with automatic totals and tax, then print or save as PDF. No sign-up. - [How to write an invoice](https://goka-xi.vercel.app/tools/how-to-write-an-invoice/) — How to write an invoice that gets paid: what to include, how to number it, payment terms that work, and the mistakes that delay payment. With a free template. - [Packing list generator](https://goka-xi.vercel.app/tools/packing-list/) — Free packing list generator: pick the trip type and length and get a travel checklist you can tick off, print or copy. Beach, city, winter, business or backpacking. - [Best countdown widget apps for iPhone (2026)](https://goka-xi.vercel.app/tools/best-countdown-widget-apps-iphone/) — Seven iPhone countdown widget apps compared on free tier, which widgets cost money, repeats, reminders and sync — from their App Store listings, Sept 2026. - [Free tools & guides — go ka](https://goka-xi.vercel.app/tools/) — Free, no-sign-up tools from go ka: days-until calculator and holiday countdowns, an invoice template and guide, and a packing list generator. - [Ferramentas e guias grátis — go ka](https://goka-xi.vercel.app/tools/pt-br/) — Ferramentas grátis e sem cadastro da go ka: contagem regressiva para o ENEM 2026, Réveillon e Carnaval 2027, e mais. ## FAQ ### What is go ka? go ka is an independent developer making small iPhone apps for everyday things: a countdown widget, an AI trip planner, an invoice maker, a photo calorie counter, a QR code maker, an English vocabulary app for kids and a gym workout tracker. All seven are published on the App Store under one developer account. ### Are the apps free? All seven apps are free to download and can be used without paying. Extra features come with an optional subscription, and some apps also offer a one-time purchase. The price is always shown in the app before you confirm. ### Do I need to create an account? No. None of the apps asks you to sign up or create an account. Where an app syncs between your devices, it uses your own iCloud. ### Which devices do the apps run on? iPhone and iPad. Six of the apps need iOS 17 or later; DailyCalorie needs iOS 18 or later. ### Which languages are the apps available in? Countdown, BeforeGo, Invoice Maker, DailyCalorie and Word Beast are available in 10 or more languages, including English, Chinese, Japanese, Korean, French, German, Italian, Portuguese and Thai. QR Studio and Repdex are in English. ### How do I get help with one of the apps? Email qinqiangji@gmail.com and say which app it is about. Every message is read. Each app also has its own page on this site with its privacy policy and terms. ## Notes - Every app is free to download. Paid parts, where there are any, are listed on each app's page. - No app asks for an account or sign-up. Where an app syncs, it uses the user's own iCloud. - Support and feedback: qinqiangji@gmail.com