Comparison

Inpentory vs PencilDB

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

Head to head
About

Inpentory

Features
Read full description

**A Collection Management App for Fountain Pen, Ink, and Notebook Enthusiasts** Inpentory is an app that beautifully records and manages your fountain pens, inks, notebooks, and the writing experience itself. It lets you document your cherished collection and the writing experiences created by combining them. **Key Features** ◆ **Fountain Pen Management** - Record pen photos, brand, model, and nib size - Display currently used ink - Save the date, place, and reason you acquired it along with memories ◆ **Ink Collection** - Record actual color samples with photos - Save bottle appearance - Manage brand, name, and color details ◆ **Notebook & Planner Management** - Cover photos and detailed specs (ruling, size, page count) - Track usage status - Record paper quality and brand information ◆ **Writing Sample Feature** - Photograph pen, ink, and notebook combinations - Note writing feel, compatibility, and impressions - Save combination records **Special Value** The charm of analog stationery lies in the combination of pen, ink, and paper. Even the same pen feels completely different with different ink or paper. With Inpentory, you can record that moment of delight with photos and text, allowing you to revisit it anytime. **Premium Features** - Unlimited item registration (Free version: up to 5 items each) - Access to future updates and new features - Ongoing development support **Recommended For** - Fountain pen enthusiasts - Ink collectors - Those passionate about planners and notebooks - People who enjoy experimenting with writing instrument combinations - Individuals who value both digital and handwritten expressions Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

PencilDB

Features
Read full description

PencilDB is a database of mechanical pencils, ballpoint pens, fountain pens and inks. We build it together, and we correct it together. ■ Point the camera, and the pen identifies itself Move the camera slowly toward the part number printed on the barrel. PencilDB reads the marking and looks it up. Recognition happens entirely on your device. The photo itself never leaves your iPhone. ■ Keep a record, one pen at a time Sort pens into "Owned" and "Wanted". Add what you paid, when you bought it, where from, and what condition it is in — as much or as little as you feel like. Every one of those fields can be left empty. ■ Used prices come into view Once two or more people have reported what they paid for a part number, the price it actually changes hands for starts to appear. While only one report exists, no figure is shown. Otherwise what you paid would become "the market price" all by itself. ■ Straight to a shop that sells it For each part number, the shops selling it today are listed with their prices. Links that earn us a commission are marked as ads. ■ Know the company behind the brand Company profiles for 64 brands, with every model they make. Founding year, country, and what they have built over the years. ■ Articles Barrel materials, nib widths, the stories behind the brands — written for people who are serious about pens. ■ What is in it now 2,854 models, 12,460 part numbers, 64 brands. Sailor / Montblanc / Pilot / Mitsubishi Pencil (uni) / Platinum / LAMY / Zebra / Pentel / Faber-Castell / Caran d'Ache / Kuretake / Kaweco / Visconti / Montegrappa / Eboya / WANCHER and more. Everything comes from the manufacturers' own price revision documents and official sites. Each entry records where it came from. ■ A nickname, a password and an email address. Nothing else. No real name, no street address. The only thing shown publicly is your nickname. The email address exists so you can reset a forgotten password; it never appears on screen. ■ Corrected by everyone Found a mistake? Anyone can submit a correction, photos included. A person reviews them before they go live. Once two people are friends, they can message each other. Anyone you would rather not hear from can be blocked, and problems can be reported. ―――――― Site https://www.pencildb.com Terms https://www.pencildb.com/terms Privacy https://www.pencildb.com/privacy

Screenshots

Inpentory4 screens
PencilDB4 screens

Verdict

The call

The clearest difference is in-app purchases: PencilDB at none against Inpentory's 3. PencilDB also leads on update cadence (every 9 days vs every 5 weeks). On price, ads, device support 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

CostPrice ¡ In-app purchases ¡ Ads ¡ Monetization

Both are free to download. Inpentory sells 3 in-app purchases, starting at $1.99 per month. PencilDB asks for nothing beyond the download.

UpkeepUpdate frequency

Inpentory ships an update every 5 weeks, PencilDB every 9 days. Both last shipped on October 25, 2026.

Scorecard2 real differences ¡ 4 level
Inpentory versus PencilDB: the parameters behind the verdict, then further details
ParameterInpentoryPencilDB
PriceFreeFree
Update frequencyEvery 5 weeksEvery 9 days — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size3 MB1 MB
Age rating4+4+
DeveloperRyunosuke Sawadaideo Entertainment Inc.

In-app purchases

3 purchases

Inpentory

Subscriptions2
  • プãƒŦミã‚ĸãƒ æœˆéĄãƒ—ãƒŠãƒŗ$1.991 Month
  • プãƒŦミã‚ĸãƒ åš´éĄãƒ—ãƒŠãƒŗ$9.991 Year
One-time1
  • プãƒŦミã‚ĸãƒ ãƒ—ãƒŠãƒŗ$14.99
None

PencilDB

No in-app purchases

Questions

Is Inpentory free?
Inpentory is free to download, with in-app purchases available.
Is PencilDB free?
PencilDB is free to download, with no in-app purchases.
Do Inpentory or PencilDB have ads?
Neither Inpentory nor PencilDB shows ads.
Which is updated more often, Inpentory or PencilDB?
Inpentory ships an update every 5 weeks, and PencilDB every 9 days. Most recently, Inpentory was updated on October 25, 2026 and PencilDB on October 25, 2026.

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