Comparison

Gewu vs Nenrin

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

Head to head
About

Gewu

Features
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A local-first, on-device AI-powered iOS app for personal item and inventory management. Inspired by the philosophy of understanding things through observation — Gewu helps you quickly identify items and categories by taking photos or selecting images, then easily track quantities, expiration dates, and storage locations. Core Features: • AI Recognition: Snap a photo or pick from album — AI auto-detects item names and categories • Inventory Tracking: Confirm quantities, shelf life, and expiry dates for precise control • Expiry Alerts: Get notified before items expire, never waste again • Location Tags: Add storage labels to every item, find things instantly • Custom Categories: Organize with personalized categories and tags • On-Device Privacy: All data stays on your device, fully private and secure Perfect for managing food, medicine, cosmetics, documents, IDs, and everyday household items. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://gewuapp.yunlongzhu.com/privacy.html

About

Nenrin

This app functions as a unique diary, organizing entries into 365 Markdown files, one for each day of the year. It allows you to revisit past entries for any given date, see your writing history through a heatmap, and search across all your years of writing. It also offers a home-screen widget and nightly reminders to encourage consistent journaling.

Highlights
  • Daily Markdown file organization
  • Cross-year entry viewing
  • Yearly writing heatmap
  • Full-text search across years
  • Home-screen widget
  • Nightly writing reminders
  • Plain Markdown export
Features
Read full description

Nenrin (年輪, "tree rings") is a diary made of just 365 files: one Markdown file for each day of the year. Whatever you write on a given day goes into that day's file under a "## year" heading — so every year's entry for today stacks on the same page. Write today, and next year's you opens this page and reads it. The more years you keep it, the better it gets. TODAY The app opens on today's page. Past years sit in a row of chips above the entry; tap one to switch, or hold the text and pull down to go back a year. Years you skipped on this day are pointed out, and you can fill them in any time. The entry is a Markdown editor: headings, lists, quotes and bold are highlighted as you type, with a row of marks above the keyboard for quick insertion. Photos you took on this day appear below the entry — read from your library, never written into the file. YEAR A heatmap of all twelve months. Each cell is one file; the darker it is, the more years that day has been written in. One ring a year, deeper each time. Full-text search covers every year in all 365 files: search a word and watch it cross the years. ON THIS DAY A home-screen widget that shows what you wrote on today's date in past years. NIGHTLY REMINDER A nudge at the time you choose to write today's lines. YOUR FILES, YOUR RULES • Plain Markdown you can open in any editor • Keep it on your iPhone (visible in the Files app) or point it at a folder in iCloud Drive • Point Nenrin for Mac at the same folder and both write the same diary; saves replace only the current year's section, so writing on two devices never overwrites the other • No account, no server of ours — your diary lives only on your devices and in your own iCloud Drive

Screenshots

Gewu4 screens
Nenrin4 screens

Verdict

The call

The clearest difference is update cadence: Nenrin at every 3 days against Gewu's weekly. Nenrin also leads on iOS requirement (18.0 vs 26.0). On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Gewu sells 3 in-app purchases, starting at $9.99 per year and Nenrin sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Gewu ships an update weekly, Nenrin every 3 days. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.

Scorecard2 real differences · 8 level
Gewu versus Nenrin: the parameters behind the verdict, then further details
ParameterGewuNenrin
PriceFreeFree
Rating—4.0 (2 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—2 — better
Update frequencyWeeklyEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad — betteriPhone
Requires iOS26.018.0 — better
Further details — not scored
Size50 MB6 MB
Age rating4+4+
Developer云龙 朱鹏鹏 任

In-app purchases

3 purchases

Gewu

Subscriptions1
  • Gewu VIP$9.991 Year
One-time2
  • 1 Extra Slot$0.99
  • 3 Extra Slots$1.99
1 purchases

Nenrin

One-time1
  • Nenrin Pro Lifetime$5.99

Questions

Is Gewu free?
Gewu is free to download, with in-app purchases available.
Is Nenrin free?
Nenrin is free to download, with in-app purchases available.
Do Gewu or Nenrin have ads?
Neither Gewu nor Nenrin shows ads.
Which is updated more often, Gewu or Nenrin?
Gewu ships an update weekly, and Nenrin every 3 days. Most recently, Gewu was updated on October 31, 2026 and Nenrin on November 1, 2026.

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