Comparison

Act Four vs Kaffedex

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

Head to head
About

Act Four

Learn to brew perfect espresso with video guidance and taste analysis. The app tracks your brew automatically, helping you adjust your machine and recipe for your ideal cup. Designed for both beginners and experienced baristas.

Highlights
  • Video-guided brewing workflow
  • Speed and taste analysis
  • Machine and grinder adjustment guidance
  • Automatic recipe tracking
  • Hands-free operation
  • Brew Weight and Timing adjustments
Features
Read full description

Let’s brew amazing espresso. New to espresso? Act Four’s video-guided workflow is designed to quickly walk you through the same steps used by professional baristas. We’ll analyze the speed and taste of each brew to tweak your machine, grinder, and brew recipe until you land on your ideal cup. Espresso pro? Let’s dial in by taste. After each brew, we’ll dive into the tasting experience to drive adjustments to Brew Weight and Brew Timing. Each brew iterates on the previous until we hit that magic cup. Act Four’s minimal workflow is designed to be hands-free and out of your way. Just open the app for automatic recipe, preinfusion, brew, and flow rate tracking. Privacy Policy: https://actfour.coffee/privacy Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Kaffedex

Read full description

Dial in espresso in 1–2 shots, not 15. Kaffedex is the espresso companion for baristas and serious home enthusiasts who are tired of wasting beans guessing dose and grind. Log a pull and Kaffedex tells you the next move — dose and grind direction — converging on a great shot in a couple of calibration pulls instead of a dozen throwaways. DIAL IN FASTER • Log dose, yield, time, grind setting and basket — get a suggested next pull with a dose and a grind adjustment. • The reasoning runs fully offline. It reads your actual shots; roast level, varietal and process fine-tune the call. • Grind advice is shown in your grinder's own clicks or marks AND in plain "finer / coarser" — because no two grinders agree on which way the numbers go. KNOWS YOUR GRINDER • Hand-drawn dials for Niche, Timemore, Lagom, EK43, Mazzer, Weber, Acaia Orbit, Zerno and more — including aftermarket burrs. • Per-burr calibration that sharpens the more you pull. MEASURE LIKE A PRO • Extraction dashboard: TDS, extraction yield, and a live shot graph with flow. • Pair a Bluetooth scale or refractometer to capture weight, time and TDS automatically. THE CODEX — PRO • A built-in coffee encyclopedia: 60+ variety stories, processing methods, origin countries with shaded-relief terrain maps, Cup of Excellence farms, and a sensory guide. LIVES ON YOUR PHONE • Home-screen widgets and a Live Activity / Dynamic Island shot timer. • iCloud sync across iPhone and iPad. • Share any recipe as a scannable card and import a teammate's dial-in in seconds. Free: up to 4 beans with 20 pulls each, the complete rule-based dial-in engine, every grinder dial, and the full extraction dashboard. Kaffedex Pro: unlimited beans and pulls, the entire Codex, and AI coaching — turn a taste note like "sour and thin" into a concrete adjustment, plus varietal-aware guidance. Less guessing. Fewer wasted shots. Better coffee. — Legal Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://octolabo.app/kaffedex/privacy/

Screenshots

Act Four4 screens
Kaffedex4 screens

Verdict

The call

The clearest difference is iOS requirement: Act Four at 16.0 against Kaffedex's 18.0. On price, update cadence, ads and in-app purchases 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. Act Four sells 3 in-app purchases, starting at $3.99 per month and Kaffedex sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Act Four ships an update every 8 days, Kaffedex every 10 days. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.

Scorecard1 real difference · 9 level
Act Four versus Kaffedex: the parameters behind the verdict, then further details
ParameterAct FourKaffedex
PriceFreeFree
Rating5.0 (17 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings17 — better—
Update frequencyEvery 8 days — betterEvery 10 days
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad — better
Requires iOS16.0 — better18.0
Further details — not scored
Size4 MB28 MB
Age rating4+4+
DeveloperAIV, LLCCiantury Octojaya

In-app purchases

3 purchases

Act Four

Subscriptions2
  • Monthly3 Days trial$3.991 Month
  • Yearly7 Days trial$29.991 Year
One-time1
  • SwitchBot Integration$19.99
4 purchases

Kaffedex

Subscriptions2
  • Kaffedex Pro (Monthly)3 Days trial$4.991 Month
  • Kaffedex Pro (Yearly)3 Days trial$34.991 Year
One-time2
  • 100 AI Credits (Aipack100)$4.99
  • Kaffedex Pro — Lifetime access$79.99

Questions

Is Act Four free?
Act Four is free to download, with in-app purchases available.
Is Kaffedex free?
Kaffedex is free to download, with in-app purchases available.
Do Act Four or Kaffedex have ads?
Neither Act Four nor Kaffedex shows ads.
Which is updated more often, Act Four or Kaffedex?
Act Four ships an update every 8 days, and Kaffedex every 10 days. Most recently, Act Four was updated on October 9, 2026 and Kaffedex on October 6, 2026.

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