What Did I Do? vs Stacky
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
What Did I Do?
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How to use What did I do?: 1) Receive a gentle hourly reminder 2) Quickly log what you did in the past hour 3) Build a timeline of your day effortlessly If you want to be more mindful, productive, and intentional with your time, What Did I Do? will help you get there with less effort than any other app. We aren’t another complicated productivity tracker. No clutter, no endless setup. Just simple hourly Reminders that keep you aware of how you’re really spending your time. Over days and weeks, you’ll start to see patterns, habits, and opportunities to focus on what matters most. Whether you’re working, studying, exercising, or relaxing, What Did I Do? helps you: We want to empower you to live with clarity and focus. You’ll be surprised how quickly awareness transforms into action.
Stacky
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“I need that thing I just copied.” Stacky is a clipboard history and snippet app where copied text quietly stacks up the moment you open it. Everything stays on your device — never sent to our servers. No ads. ◆ Capture • Auto-capture: Copy in another app, open Stacky, and it stacks into your history. • Save Copy: Select text, pick “Save Copy” from the Share menu, and saving and copying happen in one step. • Back Tap: Assign “Save Clip” under Settings > Accessibility > Touch > Back Tap, then double-tap the back of your iPhone to save without opening the app. • Dynamic Island capture meter: Every save stacks the count in the Dynamic Island. Clip contents are never shown — not on the Lock Screen, not in the Island. You see that it was captured, nothing more (optional). ◆ Find & organize • Automatic types: Links, emails, phone numbers, and numbers are tagged automatically — detected without reading the actual contents. • Manual tags: Add your own tags and filter by chip. • Full-text search (Pro): Pull any clip from your whole stack in an instant by keyword. ◆ Templates • Save go-to greetings and email boilerplate, then copy with a single tap. • Auto variables like {date} and {time} (free). • Custom variables like {name} that you fill in when copying (Pro). ◆ Connect (Pro) • iCloud sync: History and templates stay in sync across iPhone and Mac on the same Apple ID. No account, no login. • Mac companion: Text you “Save Copy” on iPhone lands right on your Mac’s clipboard. ◆ Privacy • Clip contents are stored only on this device and in your own iCloud — never sent to our servers. • No ad SDKs, ever. The clipboard holds sensitive things, so we kept the design quiet and clean. • Optionally skip saving password-like text. ◆ Free • 50 clips of history • 10 templates • All capture methods (auto-capture, Save Copy, Back Tap, Dynamic Island) ◆ Stacky Pro • Unlimited history + full-text search • Unlimited templates + custom variables • iCloud sync + Mac companion Pricing: ¥500/month · ¥3,000/year (¥250/mo) · ¥6,000 one-time Monthly and annual plans are auto-renewing subscriptions. The one-time purchase unlocks Pro permanently with a single payment. Restore anytime via “Restore Purchase.” Start free, and enjoy watching your copies stack up. Terms of Use: https://stacky.tools/en/terms Privacy Policy: https://stacky.tools/en/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: What Did I Do? at none against Stacky's 3. What Did I Do? also leads on update cadence (every 6 weeks vs every 3 months). Stacky's advantage is iOS requirement (16.4 vs 18.5). 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
Both are free to download. Stacky sells 3 in-app purchases, starting at $2.99 per month. What Did I Do? asks for nothing beyond the download.
What Did I Do? ships an update every 6 weeks, Stacky every 3 months. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.
| Parameter | What Did I Do? | Stacky |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 18.5 | 16.4 — better |
| Further details — not scored | ||
| Size | 1 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Antonius Werhahn | Hiroki Nomura |
In-app purchases
What Did I Do?
No in-app purchases
Stacky
- Stacky Pro Monthly$2.991 Month
- Stacky Pro Yearly$19.991 Year
- Stacky Pro Lifetime$39.99









