Stamp Studio vs Annidiem
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Stamp Studio
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Stamp Studio is a focused tool for preparing documents on your iPhone or iPad. Import a PDF, add a reusable handwritten signature or custom stamp, and export a finished copy when you are ready to share it. FEATURES โข Import PDF documents from Files โข Draw and save handwritten signatures โข Create reusable business-style stamps and seals โข Extract a stamp from a photo or camera image with a transparent background โข Move, resize, rotate, and rename signatures and stamps โข Place marks on individual PDF pages or create an edge seal across multiple pages โข Rename imported files and export a new signed PDF YOUR FILES STAY ON YOUR DEVICE Stamp Studio processes documents, signatures, and stamps locally on your device. Camera and photo-library access are used only when you choose to capture or import an image for stamp extraction. Stamp Studio offers auto-renewable subscriptions. The Terms of Use are governed by the Apple Standard License Agreement (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Annidiem
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Your calendar manages your schedule. Annidiem remembers the days for you. If you think you're a bit ahead of the curve, this one's for you. Birthdays, weddings, exams, trips, the day your baby arrived, the day you moved in โ the days that matter deserve better than a crowded calendar. Some are still ahead of you. Some already happened. Either way, they deserve somewhere to stay. Flip the bottom-right corner of a card and it turns over into that day's own record. You don't have to wait for the day itself โ write while you're looking forward to it, while you miss it, or the moment it crosses your mind: photos, thoughts, voice memos, short videos, each one stamped with the place and weather of that moment. No folders to create, no "where should this photo go" โ it belongs to a day, so it stays with that day. If you remember which day it was, you'll find it again. And when the same day comes round again, every year keeps its own: this year never mixes with last. When a day is no longer in focus, put it away โ not throw it out. It leaves your home screen and stops reminding you, while the diary and photos stay, ready to bring back. Life gets simpler. The memories don't have to. - TALK TO THIS DAY โ flip a card over for that day's own record; write whenever it comes to you - ARCHIVE โ put days that no longer need your attention away, without deleting anything - CARD WALL โ big countdown numbers for every day that matters - TICKING MOMENTS โ live days/hours/minutes/seconds; past days keep counting up: 1000 days together, 90 days smoke-free, day 300 of the project - WEEK & DAY OF YEAR โ which week and day of the year today is, at a glance - PHOTO COVERS โ pick a photo for a date and the card becomes its face - ON THIS DAY โ the days that happened on today's date in past years surface on their own - DYNAMIC ISLAND โ pin any day to your Dynamic Island - WIDGETS โ gradient cards, Lock Screen widgets, and a large widget that shows your next five days - ERA OF DAYS โ one 3D timeline for all your days: days with photos stand along the road, tap one to fly in - APPLE WATCH SYNC โ a glance at your wrist: watch app and watch face complications, updated from your iPhone - TAKE A BREATHER โ the screen dims, and the fireworks begin - WORTH SHARING โ five share card styles: gradient, minimal, poster, midnight, photo - ANY RHYTHM โ daily, weekly, monthly, or an interval you set yourself; paydays and bill days stay in step - FIND ANY DAY โ search titles, notes, even "August"; filter to this month, the next 30 days, or what's already past - ASK SIRI โ "how many days until New Year?" works, and so do Shortcuts and system search - REMINDERS YOUR WAY โ the day itself, or 1/3/7/14/30 days ahead, at a time you choose - TYPE DAYS, GET DATES โ enter "100 days" and the date computes itself - FACE ID LOCK โ auto-lock in background; some days are yours alone - CALENDAR BRIDGE โ import from system Calendar; export .ics/JSON to iCloud Drive - ICLOUD SYNC โ sign in to iCloud and every device stays in sync - DATE CALCULATOR โ days from birth to today, or today to payday; days between dates, business days, and more - ON-DEVICE AI BLESSINGS โ Apple Intelligence writes personalized blessings, fully offline (iPhone 15 Pro or later) One-time purchase ยท No subscription ยท No ads ยท Collects no data โ your data stays on your device and in your own private iCloud database, and everything works offline.
Screenshots
Verdict
The clearest difference is update cadence: Annidiem at weekly against Stamp Studio's monthly. Stamp Studio's advantage is iOS requirement (16.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Stamp Studio ships an update monthly, Annidiem weekly. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.
| Parameter | Stamp Studio | Annidiem |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Weekly โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch โ better |
| Requires iOS | 16.0 โ better | 18.0 |
| Further details โ not scored | ||
| Size | 4 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Beijing Yangming Jiuha Technology Co., Ltd | Haiguang Yin |
In-app purchases
Stamp Studio
No in-app purchases
Annidiem
No in-app purchases









