Act Four vs Proof
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Video-guided brewing workflow
- Speed and taste analysis
- Machine and grinder adjustment guidance
- Automatic recipe tracking
- Hands-free operation
- Brew Weight and Timing adjustments
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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/
Proof
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Proof shows you the cheapest drink prices at stores near you. Browse beer, seltzer, cider, and liquor, sorted by price per unit so you can compare across pack sizes and stores instantly. Spotted a price? Snap a photo of the shelf and submit it for the community. Every price is verified before it goes live.
Screenshots
Verdict
The clearest difference is in-app purchases: Proof at none against Act Four's 3. Proof also leads on device support (3 vs 1). On price, update cadence, ads and iOS requirement 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
Both are free to download. Act Four sells 3 in-app purchases, starting at $3.99 per month. Proof asks for nothing beyond the download.
Act Four ships an update every 8 days, Proof every 2 weeks. The most recent releases landed on October 9, 2026 and September 27, 2026 respectively.
| Parameter | Act Four | Proof |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (17 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 17 — better | — |
| Update frequency | Every 8 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 2 MB |
| Age rating | 4+ | 17+ |
| Developer | AIV, LLC | Shaun Ehrhart |
In-app purchases
Act Four
- Monthly3 Days trial$3.991 Month
- Yearly7 Days trial$29.991 Year
- SwitchBot Integration$19.99
Proof
No in-app purchases
