Comparison

Replyly AI vs Synopsule

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

Head to head
About

Replyly AI

Enhance your text messages with AI-powered rewrites and personalized tones. This app helps you communicate more clearly and confidently across all your messaging platforms.

Highlights
  • AI-powered message rewrites
  • Keyboard extension for direct use
  • Personalized relationship profiles
  • Multiple tone controls
  • Private and Smart AI modes
  • History and communication insights
Read full description

Stop overthinking texts. Replyly helps you rewrite messages, generate better replies, and communicate more confidently across every app on your iPhone. Whether you’re texting your boss, replying on a dating app, messaging friends, or handling important conversations, Replyly helps your messages sound clearer, more natural, and more like you. Use the keyboard extension directly inside your favorite apps or open the full Replyly experience for profiles, history, insights, and advanced communication tools. FEATURES • AI-powered message rewrites Improve awkward drafts instantly with natural, polished responses. • Keyboard extension Rewrite messages directly inside iMessage, WhatsApp, Instagram, Gmail, Slack, Notes, and more. • Relationship Profiles Create profiles for work, dating, family, friends, and recurring conversations to personalize tone automatically. • Tone Controls Choose from tones like Friendly, Professional, Confident, Calm, Casual, Flirty, and more. • Private Mode On supported devices, Private Mode uses Apple Intelligence on-device for supported rewrites so your data stays private. • Smart AI Mode Use cloud AI for richer rewrites, advanced suggestions, and more powerful communication assistance. • History & Insights Browse saved rewrites, favorite responses, and understand your communication patterns over time. • Built for real conversations From quick replies to important messages, Replyly helps reduce overthinking and improve confidence while texting. REPLYLY PRO Upgrade to Replyly Pro for: • Unlimited Smart AI rewrites • Advanced tones • Relationship profiles • Advanced insights • Long-form workflows • Priority new features Replyly is designed to help you communicate clearly, confidently, and naturally — everywhere you type. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://replylyai.app/privacy

About

Synopsule

This app transforms your iPhone and Apple Watch into a private transcription studio. It records conversations, provides live transcripts, and identifies speakers locally on your device. Optional AI summaries can be generated using your own keys or through a subscription.

Highlights
  • On-device recording and transcription
  • Speaker identification and labeling
  • Local AI summarization
  • Time-anchored notes and flags
  • Full-text search
  • Multiple export formats
  • Playback and editing tools
Features
Read full description

CALENDARS & MEETING REMINDERS Choose Apple Calendar calendars, including synced Google accounts. Set optional reminders, timing, sound and title privacy. Mute recurring series or notify only for invites with meeting links or dial-in details. Choose a meeting to use its title and invited-name suggestions. Recording starts only when you choose Record. Synopsule turns your iPhone and Apple Watch into a private transcription studio. Record any conversation, see a live transcript as you talk, and when you stop, see who said what - all on your device. Everything runs locally by default. Your audio never gets uploaded. RECORD ON iPHONE OR APPLE WATCH Tap record on iPhone for live transcription while you talk. Start from Apple Watch when your phone is not in hand, pause or resume, add markers, and send the saved recording to your paired iPhone for local processing. TRANSCRIBES LOCALLY WITH WHISPER OpenAI's open-source Whisper model runs entirely on your iPhone, optimized for Apple silicon. Choose a model size that fits your phone, from a fast compact model to a larger high-accuracy model. The download size is shown up front, and the model runs on-device once installed. LABELS AND RECOGNIZES SPEAKERS When a recording finishes, Synopsule figures out who said which line and assigns colored speaker labels on device. Name speakers and reuse saved voices across recordings. Voiceprints stay on your iPhone. NOTES AND FLAGS, ANCHORED IN TIME Jot notes while you record or read. Each note is pinned to the moment, so tap to seek straight back, and your notes can feed into the AI summary as context. Drop a flag on anything worth finding again and give it a label. OPTIONAL AI SUMMARIES, ON YOUR TERMS Press Summarize, pick a template, and get a structured, speaker-aware recap with action items and open follow-ups. Then choose where it runs: - Bring your own OpenAI, Anthropic, or Google Gemini key. Transcript text goes directly to that provider. - On an Apple Intelligence-capable iPhone, summarize on-device when available. - Or subscribe to Synopsule Pro and run summaries without managing your own key. Synopsule names the destination and asks consent before any text leaves your phone. Your audio is never sent anywhere - only transcript text, only when you ask. You can revoke consent any time in Settings. POWERFUL PLAYBACK AND EDITING Tap any line to jump to that moment in the audio. The transcript follows along as it plays. Fix a word or reassign a speaker inline whenever you like. SEARCH EVERYTHING Full-text search runs across every transcript. Filter by who spoke using speaker: queries to jump straight to the right moment. EXPORT ANYWHERE Export to Markdown, Word (.docx), plain text, SRT and VTT subtitles, or interactive HTML. You can also send a transcript straight into Obsidian or Apple Notes in one tap. Choose what to include: timestamps, speaker labels, grouping by speaker, and the AI summary. PRIVACY YOU CAN VERIFY - iPhone microphone audio is captured and transcribed on your iPhone. - Apple Watch recordings are stored locally on the Watch until transferred to your paired iPhone for on-device processing. - Transcripts live in protected app storage. Delete any recording whenever you want. - No ads and no cross-app tracking. Optional anonymous product analytics can be turned off in Settings. SYNOPSULE PRO (OPTIONAL) Subscribe monthly ($4.99) or yearly ($39.99) to run AI summaries without managing your own API key. Subscriptions auto-renew until cancelled; manage or cancel any time in Settings > Apple Account > Subscriptions. The same subscription works on Synopsule for Mac. Requires iOS 17 or later. Apple Watch recording requires watchOS 26 or later and a paired iPhone. Read the full privacy policy at synopsule.com/privacy.

Screenshots

Replyly AI4 screens
Synopsule4 screens

Verdict

The call

The clearest difference is price: Replyly AI at Free against Synopsule's $1.99. On rating, ratings volume, update cadence and ads 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

Replyly AI is free to download; Synopsule costs $1.99 up front. Replyly AI sells 2 in-app purchases, starting at $7.99 per month and Synopsule sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Replyly AI against 5.0 for Synopsule. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

UpkeepUpdate frequency

Replyly AI ships an update every 10 days, Synopsule every 5 days. The most recent releases landed on September 26, 2026 and September 28, 2026 respectively.

Scorecard2 real differences · 7 level
Replyly AI versus Synopsule: the parameters behind the verdict, then further details
ParameterReplyly AISynopsule
PriceFree — better$1.99
Rating5.0 (3 ratings)5.0 (2 ratings)
Number of ratings3 — better2
Update frequencyEvery 10 daysEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, Mac, Apple Watch — better
Requires iOS18.017.0 — better
Further details — not scored
Size2 MB99 MB
Age rating9+4+
DeveloperSri Appala AdatraoSunny Nagra

Customer experience

Replyly AI

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Synopsule

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Replyly AI

Subscriptions2
  • Replyly Pro$7.991 Month
  • Replyly Pro Annual$59.991 Year
2 purchases

Synopsule

Subscriptions2
  • Synopsule Pro Monthly$4.991 Month
  • Synopsule Pro Yearly$39.991 Year

Questions

Is Replyly AI free?
Replyly AI is free to download, with in-app purchases available.
Is Synopsule free?
Synopsule costs $1.99, and also offers in-app purchases.
Which has better reviews, Replyly AI or Synopsule?
Replyly AI and Synopsule are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.
Do Replyly AI or Synopsule have ads?
Neither Replyly AI nor Synopsule shows ads.
Which is updated more often, Replyly AI or Synopsule?
Replyly AI ships an update every 10 days, and Synopsule every 5 days. Most recently, Replyly AI was updated on September 26, 2026 and Synopsule on September 28, 2026.

Other comparisons