UnderLine vs Long time
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UnderLine
Read full descriptionHide full description
【概要】 UnderLineは、入力している途中の言葉がリアルタイムで相手に届く、新しいかたちの1対1メッセージアプリです。 一般的なメッセージアプリでは、送信ボタンを押してから相手へ言葉が届きます。UnderLineでは、文字を入力した瞬間から会話が始まります。入力した文字を消した場合も相手側の表示へ反映されるため、離れていても、言葉が生まれていく過程や会話のテンポを共有できます。 主な機能 - 入力途中の文章を相手へリアルタイム表示 - シンプルな1対1メッセージ - 公開ID・QRコードによる友だち追加 - れんらく先、トーク一覧、トークルーム内の検索 - メッセージのブックマーク - トークごとの通知オン・オフ、ピン留め、非表示 - 新着メッセージ通知 - ブロック、通報、アプリ内でのアカウント削除 - QRコードを使った暗号化端末移行 - iCloud暗号化バックアップと復元 メッセージ本文と入力途中の文章はエンドツーエンド暗号化されます。プッシュ通知にメッセージ本文は表示されません。 会話のタイミングをつかむことに不安を感じる方や、文字でのコミュニケーションをより自然に楽しみたい方にもお使いいただけます。言葉が完成する前から気持ちが伝わっていく、UnderLineならではの会話をお試しください。 ご利用上の注意 - 入力途中の文章は、同じトーク画面を開いている相手に表示されます。送信前でも相手に見られるため、相手へ見せたくない内容は入力しないでください。 - 通知を許可すると、アプリがバックグラウンドまたは終了中でも新着通知を受け取れます。通知にメッセージ本文は表示されません。 UnderLine is a one-to-one messaging app that lets your conversation partner see your words in real time while you type. Unlike conventional messaging apps, where the other person sees your words only after you tap Send, UnderLine lets the conversation begin from the moment you start typing. When you delete draft text, the change is also reflected on the other person's screen. This makes it possible to share the rhythm of a conversation and the way words take shape, even when you are apart. Key features - Real-time display of text while it is being typed - Simple one-to-one messaging - Add friends using public IDs or QR codes - Search contacts, conversations, and messages within a chat - Bookmark individual messages - Mute notifications, pin conversations, or hide them from your list - Push notifications for new messages - Blocking, reporting, and in-app account deletion - Encrypted device-to-device transfer using a QR code - Encrypted iCloud backup and restoration Message bodies and live-typing text are end-to-end encrypted. Push notifications never include message content. Important notes - Live typing is visible while the other person has the same conversation open. Because text may be seen before you tap Send, do not type anything you do not want the other person to see. - Enable notifications to receive new-message alerts while the app is in the background or closed. Message content is not shown in notifications.
Long time
This AI-powered service helps you find people you've lost touch with by analyzing shared memories and details. Reconnect with past connections like first loves, childhood friends, or old colleagues by providing clues from your memories.
- AI Deep Sync Matching
- AI Standard Matching
- Memory-based AI analysis
- Mutual match confirmation
- Privacy-focused design
Read full descriptionHide full description
Long time Reconnect with someone from your memories through AI Is there someone who suddenly comes to mind? Your first love, a childhood friend you used to play with, a neighbor you lost touch with after moving away, a fellow soldier you served with, or a precious connection that faded over time. Long time is an AI matching service that helps you find people you have long lost touch with, using clues hidden in your memories. Enter memories such as the school you attended together, the neighborhood you lived in, memorable events, meaningful places, or stories from that time. AI analyzes shared details across those memories and connects people who may be looking for each other. ■ Special Features of Long time [AI Deep Sync Matching] AI analyzes your memories and experiences to find people with a strong connection to you. By deeply reasoning through all the memories you provide, it recommends possible matches. [AI Standard Matching] Based on shared places, keywords, or fragments of memory, AI quickly and simply recommends people who may be connected to you. Designed with privacy as a top priority. Connections are only made when a mutual match is confirmed. ■ Recommended For • Anyone who suddenly thinks of their first love • Anyone who wants to find a friend they lost touch with • Anyone who wants to reconnect with childhood memories • Anyone looking for an old comrade • Anyone who wants to reconnect with a precious bond from the past • Anyone brave enough to reach out to a connection that once passed them by ■ Memories may fade, but connections remain Every day, we meet and part ways with countless people. But some connections stay in our hearts, even as time passes. Long time gathers those pieces of memory and helps people find their way back to each other. The person in your memories may still be looking for you, too. Reconnect with them through Long time. And when you finally find that person, try saying: “Long time. How have you been?”
Screenshots
Verdict
The clearest difference is in-app purchases: UnderLine at none against Long time's 3. On price, update cadence, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Long time sells 3 one-off in-app purchases. UnderLine asks for nothing beyond the download.
UnderLine ships an update every 4 days, Long time every 6 days. Both last shipped on September 26, 2026.
| Parameter | UnderLine | Long time |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 days — better | Every 6 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 15 — better |
| Further details — not scored | ||
| Size | 85 MB | 59 MB |
| Age rating | 17+ | 17+ |
| Developer | 5mm | CHUNGUN KIM |
In-app purchases
UnderLine
No in-app purchases
Long time
- Accurate search for people$0.29
- Vague search for people$0.29
- Purchase the search number list bar$0.99









