Comparison

Ninput vs Catch

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Ninput

Read full description

Type less. Say more. Ninput brings private, on-device AI to your keyboard, helping you complete words, phrases, and sentences in messages, emails, and notes. SMART COMPLETION Get suggestions based on what you're writing. Tap a candidate to keep your thoughts moving. ENGLISH & CHINESE PINYIN Switch between English typing and Chinese Pinyin. Choose English or Chinese prediction results to suit your conversation. PRIVATE & OFFLINE Your keyboard input, predictions, and learned vocabulary stay on your device. AI predictions run locally, with no cloud uploads. Once the system model is ready, you can use predictions offline. FREE TO TRY Explore smart input with a free daily allowance. When it runs out, regular typing and basic suggestions remain available. The allowance resets each day. NINPUT PRO Subscribe monthly or yearly to remove the daily smart-input limit. Prices are shown before purchase. Payment is charged to your Apple Account. Subscriptions renew automatically unless canceled at least 24 hours before the current period ends; renewal is charged within the final 24 hours. Manage or cancel in Settings > [your name] > Subscriptions. REQUIREMENTS iOS 26 or later. AI predictions require a compatible device with Apple Intelligence enabled and its on-device model ready. Availability varies by language and region. Initial model download may require an internet connection. Regular typing remains available when AI predictions are unavailable. Privacy Policy: https://www.ningdom.com/privacy.html Terms of Use: https://www.ningdom.com/terms.html

About

Catch

This AI-powered keyboard helps you craft professional messages and generate smart replies instantly. Choose from multiple tones to ensure your communication is always clear, confident, and workplace-ready. It works seamlessly within your existing messaging apps.

Highlights
  • AI-powered message polishing
  • Smart reply generation
  • Multiple communication tones (Concise, Professional, Formal)
  • Works across various messaging apps
  • Multilingual support
  • Instant reply suggestions
Features
Read full description

AI Writing & Smart Reply Keyboard. Your words shape how people see you at work — make every message count. Catch is a keyboard that polishes your drafts and generates smart replies — instantly. No more overthinking that email to your boss, second-guessing a client reply, or staring at a message not knowing what to say. POLISH MESSAGES INSTANTLY Catch works right inside your iOS keyboard. Tap the mode button and your rough draft becomes workplace-ready. Works in iMessage, Slack, Email, WhatsApp — anywhere you type. ONE KEYBOARD, THREE TONES • Concise — Straight to the point. Ideal for busy Slack threads. • Professional — Clear and confident. Your everyday voice at work. • Formal — Precise and polished. For executives, clients, and high-stakes emails. "sorry cant make it tmrw" becomes a thoughtful, professional response — tailored to your audience. SMART REPLY — THREE RESPONSES, ONE TAP Copy any message you received, tap the reply button on the keyboard, and get three AI-generated replies instantly: • Accept — Say yes gracefully • Decline — Turn it down with tact • Buy Time — Acknowledge without committing Works with meeting invites, tricky requests, and awkward messages — in any language. READY IN 60 SECONDS Open Settings → Add Catch Keyboard → Allow Full Access. Three steps and you're set. MULTILINGUAL Communicate confidently across languages — English, 繁體中文, 简体中文, and 日本語. Catch adapts your tone naturally, no matter which language you write in. FREE TO START 50 free polishes and smart replies per day. No sign-up required. CATCH PRO (Auto-Renewable Subscription) Unlimited polishes and smart replies, all three tones, longer messages, and no delay between sends. Available as a monthly or annual subscription. Payment will be charged to your Apple ID account. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Cancel anytime. AI Writing & Smart Reply Keyboard. Catch makes sure yours are always on point. Terms of Use: https://tonestudio.dev/en/terms Privacy Policy: https://tonestudio.dev/en/privacy

Screenshots

Ninput4 screens
Catch4 screens

Verdict

The call

The clearest difference is update cadence: Catch at daily against Ninput's every 2 months. Catch also leads on iOS requirement (16.0 vs 26.0). On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Ninput sells 2 in-app purchases, starting at $1.99 per month and Catch sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Ninput ships an update every 2 months, Catch daily. The most recent releases landed on October 25, 2026 and October 7, 2026 respectively.

Scorecard2 real differences · 7 level
Ninput versus Catch: the parameters behind the verdict, then further details
ParameterNinputCatch
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 2 monthsDaily — better
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.016.0 — better
Further details — not scored
Size13 MB22 MB
Age rating4+4+
DeveloperBeijing Ningdom Technology Co., Ltd.HSUANCHI KUO

In-app purchases

2 purchases

Ninput

Subscriptions2
  • Monthly$1.991 Month
  • Yearly$14.991 Year
2 purchases

Catch

Subscriptions2
  • Catch Pro$4.991 Month
  • Catch Pro$39.991 Year

Questions

Is Ninput free?
Ninput is free to download, with in-app purchases available.
Is Catch free?
Catch is free to download, with in-app purchases available.
Do Ninput or Catch have ads?
Neither Ninput nor Catch shows ads.
Which is updated more often, Ninput or Catch?
Ninput ships an update every 2 months, and Catch daily. Most recently, Ninput was updated on October 25, 2026 and Catch on October 7, 2026.

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