Comparison

Stamp Studio vs Annidiem

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

Head to head
About

Stamp Studio

Features
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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 โ€ข Import PDF documents from Files โ€ข Draw and save handwritten signatures โ€ข Create reusable business-style stamps and seals โ€ข Extract a stamp from a photo or camera image with a transparent background โ€ข Move, resize, rotate, and rename signatures and stamps โ€ข Place marks on individual PDF pages or create an edge seal across multiple pages โ€ข 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/

About

Annidiem

Features
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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

Stamp Studio3 screens
Annidiem4 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Stamp Studio ships an update monthly, Annidiem weekly. The most recent releases landed on October 12, 2026 and October 13, 2026 respectively.

Scorecard2 real differences ยท 4 level
Stamp Studio versus Annidiem: the parameters behind the verdict, then further details
ParameterStamp StudioAnnidiem
PriceFreeFree
Update frequencyMonthlyWeekly โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, Apple Watch โ€” better
Requires iOS16.0 โ€” better18.0
Further details โ€” not scored
Size4 MB11 MB
Age rating4+4+
DeveloperBeijing Yangming Jiuha Technology Co., LtdHaiguang Yin

In-app purchases

None

Stamp Studio

No in-app purchases

None

Annidiem

No in-app purchases

Questions

Is Stamp Studio free?
Stamp Studio is free to download, with no in-app purchases.
Is Annidiem free?
Annidiem is free to download, with no in-app purchases.
Do Stamp Studio or Annidiem have ads?
Neither Stamp Studio nor Annidiem shows ads.
Which is updated more often, Stamp Studio or Annidiem?
Stamp Studio ships an update monthly, and Annidiem weekly. Most recently, Stamp Studio was updated on October 12, 2026 and Annidiem on October 13, 2026.

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