Oaiko vs SplitBill

Oaiko（オアイコ）は、グループのお金の貸し借りをすっきり「おあいこ」にする割り勘アプリです。 旅行・飲み会・同棲・チームのイベントなど、立て替えが入り混じる場面でも、誰がいくら払い、最終的に誰が誰へいくら返せばよいかを自動で計算します。 【主な特長】 ・支出を記録するだけで精算額を自動計算。送金回数が最小になるよう最適化します。 ・均等だけでなく「傾斜配分」「固定額」など柔軟な分け方に対応。 ・送金・受け取りはPayPay／銀行口座の情報をまとめて確認。 ・日程調整機能つき。候補日に○△×で回答し、みんなの都合を一目で集計。 ・明細書をいつでも確認・共有。誰の負担がいくらかが明朗です。 ・URLを送るだけでメンバーを招待。登録不要の「ゲスト参加」にも対応。 友だち同士の小さな立て替えから、イベントの幹事まで。お金の話を気持ちよく終わらせましょう。

"Boss pays more today", "The newbies get a discount", "Ladies pay less" — reflect the usual bill-splitting rules of Japanese drinking parties, year-end parties, and welcome/farewell dinners with a single tap. --- Key Features --- ■ Split Presets (6 types) Common Japanese group-dinner rules, each a single tap: ・Equal Split ・Boss Pays More (default 1.5x, adjustable) ・Organizer Free ・Newbie Discount (default 0.5x, adjustable) ・Ladies Discount (default 0.8x, adjustable) ・Non-Drinker Discount (default 0.7x, adjustable) Pick who's included via the chip on each member row. Multipliers are adjustable in ±0.05 steps on the card. ■ Dice Split (playful) Everyone rolls 0–9 randomly and the bill splits by the dice ratio. Example: 3 people, ¥1,000 total, dice 1/2/7 → ¥100 / ¥200 / ¥700. Includes a rolling animation and a re-roll button. Great party-ender. ■ Flexible Rounding ・Unit: ¥1 / ¥100 / ¥500 / ¥1000 ・Mode: "Leave remainder" (floor each) or "Collect extra" (ceil each) Great for "collect neatly in ¥1000 units" or "extra goes to tip". ■ Collection Tracking in Results Toggle each member as paid; a progress bar shows how much you've collected. No hard-coded organizer role — anyone can be the payer. ■ LINE-Optimized Text Copy result formatted "Tanaka-san: ¥3,500". Paste-and-go for LINE or SMS. ■ PayPay Launch One-tap open PayPay app (redirects to App Store if not installed). Amount is pre-copied to clipboard. ■ Saved Groups Save regular member groups ("Work Crew", "College Friends") and load them via horizontal chips on the main screen. Auto-saves the last 30 splits. ■ Widget (Small / Medium) Latest split result on Home Screen: total, member count, top 3 amounts. ■ iCloud Sync Groups and history sync between iPhone and iPad. No manual migration. ■ SF Symbols + Sage Green Design System icons instead of emojis. Full dark mode. --- Perfect For --- ・Company drinking parties, year-end (bounenkai) and new-year (shinnenkai) parties ・Welcome/farewell dinners (newbie discount, organizer free) ・Mixed-gender parties (ladies discount) ・When there are non-drinkers ・A fun end-of-night dice roll ・Collecting cleanly in ¥1000 units ・Quick LINE / PayPay share --- Other --- Full Dark Mode, 16 languages, iCloud sync, ¥480 Remove Ads IAP, privacy focused (device + iCloud only). --- Disclaimer --- PayPay payment requires manual action in the PayPay app. Sage Apps Series — Search "Sage Apps" on the App Store.