Comparison

BirdieSync vs SuperFlow

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

Head to head
About

BirdieSync

Seamlessly sync contacts and events between your iPhone and desktop applications like Thunderbird. Enjoy automatic updates across devices with a focus on data privacy, as information is transferred directly and securely without cloud storage.

Highlights
  • Automatic synchronization
  • Direct device-to-device transfer
  • Contact photo support
  • Multiple address books and calendars
  • Recurring events and alarms
  • Secure connection
Features
Read full description

Synchronize your contacts and events between your iPhone and Mozilla Thunderbird, Lightning and Sunbird on your PC. Keep your information up to date automatically: every modification on any device is automatically transferred to the other device. Keep your data private: your personal data is not stored in the cloud. It is directly synchronized between your device and your desktop computer through a secure connection and never goes through any third-party server. BirdieSync supports: contact photos, multiple address books and calendars, contact groups and categories, recurring events and alarms, ICS, calDAV, WCAP, Google Calendar types. Note: this app requires BirdieSync on your PC (19.95 €). You can download a fully-functional version and try it out free for 21 days (only Windows is supported).

About

SuperFlow

Features
Read full description

Turn your web reading backlog into context for your AI. Save an article or news story and SuperFlow summarizes it automatically. Listen to your unread pile with text-to-speech while you commute, and let everything you read become the "second brain" your AI agent can draw on. SuperFlow is more than a read-it-later app. Save, get an AI summary, listen, then connect what you learned to your AI agent: one flow from input to action. Sound familiar? - Articles you saved "for later" pile up and never get read - Pasting URLs into an AI chat every time you want a summary is tedious - Highlights and notes are scattered across tools - The knowledge you worked to take in never reaches your own AI agent - There is simply no time to sit down with the articles you want to read SuperFlow solves all of these at once. Key features One-tap save Save articles, news and social posts from the iOS share sheet or the browser extension, or add a URL directly in the app. Automatic AI summaries The moment you save, AI produces a high-quality summary with structure and context, so you grasp the point in seconds. Listen to your unread pile Play unread articles back-to-back with text-to-speech. Commutes, chores and runs become your best reading time. Reading log Finished items go to your library so you can see what you read and how much. Highlights and notes Highlight what matters and add notes so reading does not end when you close the tab. AI agent integration Your articles, highlights and notes are available to your AI agent through the official SuperFlow CLI. Ask it to draft a plan based on what you read this week, grounded in your own context. How it works 1. Save an article from the share button 2. Read the AI summary, or listen to it 3. Mark it done. Your knowledge is now part of your AI's memory Who it is for - Anyone who wants to finally get through their reading backlog - Busy professionals who need faster information intake - Engineers and AI-native people who want their agents to know what they know - People who want highlights and notes in one place - Commuters who want to turn travel time into learning time Note: the app interface is currently available in Japanese. Terms of Use (EULA): https://super-flow.ai/terms Privacy Policy: https://super-flow.ai/privacy

Screenshots

BirdieSync2 screens
SuperFlow4 screens

Verdict

The call

The clearest difference is in-app purchases: BirdieSync at none against SuperFlow's 3. BirdieSync also leads on iOS requirement (8.0 vs 17.0). SuperFlow's advantage is update cadence (every 5 days vs every 2 months). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SuperFlow sells 3 in-app purchases, starting at $14.99 per month. BirdieSync asks for nothing beyond the download.

UpkeepUpdate frequency

BirdieSync ships an update every 2 months, SuperFlow every 5 days. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 7 level
BirdieSync versus SuperFlow: the parameters behind the verdict, then further details
ParameterBirdieSyncSuperFlow
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews55.2% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPod — betteriPhone
Requires iOS8.0 — better17.0
Further details — not scored
Size4 MB25 MB
Age rating4+4+
DeveloperCalliciaPOSTS, Inc.

In-app purchases

None

BirdieSync

No in-app purchases

3 purchases

SuperFlow

Subscriptions3
  • Standard$14.991 Month
  • Pro$34.991 Month
  • Max$69.991 Month

Questions

Is BirdieSync free?
BirdieSync is free to download, with no in-app purchases.
Is SuperFlow free?
SuperFlow is free to download, with in-app purchases available.
Do BirdieSync or SuperFlow have ads?
Neither BirdieSync nor SuperFlow shows ads.
Which is updated more often, BirdieSync or SuperFlow?
BirdieSync ships an update every 2 months, and SuperFlow every 5 days. Most recently, BirdieSync was updated on October 17, 2026 and SuperFlow on October 15, 2026.

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