Comparison

Henji vs Decoy

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

Head to head
About

Henji

Features
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Henji is a keyboard with AI replies that learns how you actually write. Five generations a day, free forever — no card required. Copy the message you received, tap "Generate a reply," and in about three seconds a draft appears right in the text field — in your own phrasing, at your own level of formality. It works in any app: LINE, Slack, email. No app switching. 【Key Features】 ■ Generate a reply Turn a copied message into a reply in your voice, inserted straight into the field. ■ Compose a new message by voice Not just replies. Tap the mic, say what you want to send, and Henji writes it. If you have text on the clipboard, it can be used as the starting draft. ■ Personas Automatically switch tone for teammates, managers, or customers. You can also pick a different persona when regenerating. ■ Redo it by voice Say "make it shorter" or "offer three time slots" and Henji rewrites the draft with that instruction applied. ■ Go back to a version you liked Every regenerated draft is kept. Step back and forward through them and insert the one you prefer. ■ Quick replies One-tap insertion of the lines you send all day (works offline). 【About Full Access】 The Henji Keyboard works as a quick-reply keyboard without Full Access. Full Access is required only for AI generation and voice. Even with Full Access granted, Henji never collects or transmits your keystrokes. 【AI providers and your data】 Replies are generated using AI from Google (Gemini). Only when you tap "Generate a reply" is the target text — along with your instruction and your style rules — sent through Henji's server (henji.ai) to that provider. What you send is not stored on the server and is never used to train AI models. We explain this and ask for your consent during onboarding. If you decline, you can still use Henji as a quick-reply keyboard. 【Pricing】 ■ Free (no card required) Five generations a day, forever — ten on your very first day. Your allowance resets the next day. Regenerating does not count against it, so you can redo a draft as many times as you like. ■ Henji PRO (monthly or yearly, auto-renewing) For when five a day is not enough. New users can start with a 7-day free trial, after which the subscription renews automatically at $5.99 per month, or $59.99 per year. The yearly plan works out to about $5.00 per month, which saves about two months compared with paying monthly. ・Payment is charged to your Apple ID account at confirmation of purchase ・The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the period ・Your account is charged for renewal within 24 hours prior to the end of the current period ・You can cancel any time in Settings > Apple ID > Subscriptions on your iPhone ・Any unused portion of a free trial is forfeited when you purchase a subscription ・Terms of Use: https://henji.ai/en/terms ・Privacy Policy: https://henji.ai/en/privacy Quick replies work offline on both plans.

About

Decoy

Features
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The iPhone's own Notes app can't live on your Lock Screen. Decoy can, and nobody else can read it. Appointments, medication, errands you'd rather not explain. The Lock Screen is the surface you glance at most, and it's also the one other people see most. So some things never made it there. While your phone is locked, Decoy looks like a blank card, or whatever text you chose in advance. The moment Face ID passes, your real notes appear. ■ Made for ・Writing things down and then never looking at them again ・Living or working around people who glance at your screen ・Appointments and errands you'd rather keep to yourself ■ What it does ・Works as a to-do list, or as plain notes ・Reminders at the time you set ・Repeats daily, on weekdays, weekly, monthly ・Separate lists for separate parts of your life (Pro) ■ How it's built ・No ads ・Everything stays on your device by default. iCloud sync is there if you want it ・No accounts, no sign-in A note on what this is not: once Face ID or your passcode has been entered, anyone holding your phone can read your notes. Decoy hides things from the people around you, not from someone with your unlocked phone. Keep passwords and PINs in a dedicated password manager. Decoy Pro is a one-time purchase. It removes the note limit and adds per-note reminders, separate lists, and control over how things look while locked. Terms of Use: https://suzukimari.com/terms/ Privacy Policy: https://suzukimari.com/privacy-policy.html

Screenshots

Henji4 screens
Decoy4 screens

Verdict

The call

The clearest difference is iOS requirement: Decoy at 17.0 against Henji's 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. Henji sells 2 in-app purchases, starting at $5.99 per month and Decoy sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 5 level
Henji versus Decoy: the parameters behind the verdict, then further details
ParameterHenjiDecoy
PriceFreeFree
Update frequencyDaily—
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone
Requires iOS26.017.0 — better
Further details — not scored
Size12 MB10 MB
Age rating4+4+
DeveloperYUYA YOSHIDAMari Suzuki

In-app purchases

2 purchases

Henji

Subscriptions2
  • Henji PRO7 Days trial$5.991 Month
  • Henji PRO7 Days trial$59.991 Year
1 purchases

Decoy

One-time1
  • Decoy Pro$4.99

Questions

Is Henji free?
Henji is free to download, with in-app purchases available.
Is Decoy free?
Decoy is free to download, with in-app purchases available.
Do Henji or Decoy have ads?
Neither Henji nor Decoy shows ads.

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