Clastly vs Mellow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Clastly
Organize anything with custom collections and powerful field types. Track reading lists, travel memories, subscriptions, and more. Your data syncs securely via iCloud with a clean, native iOS interface.
- Customizable collections
- Multiple field types
- Pre-built templates
- Data filtering
- iCloud sync
- Ad-free experience
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Clastly is a personal database for collecting, organizing, and looking back on everything you love. Books, gadgets, travel memories, fandom, subscriptions—turn anything worth keeping into a collection shaped around you. Start quickly with templates: • Collection Catalog - Track purchase dates, condition, storage locations, and photos • Travel Log - Save places from maps or your current location • Fandom - Record concerts, merch, and favorite moments • Subscription Manager - Manage renewal dates, costs, and active services • Reading List - Organize covers, reading status, reviews, and reference URLs • Pet Diary - Capture daily moments, photos, and notes about your pets • Sauna & Spa - Record temperatures, facilities, and relaxation levels • Cafe Log - Log latte art, beans, and shop atmosphere • Movie Watchlist - Save memorable quotes, directors, and personal ratings Or start with Blank and create a structure of your own. Add fields that fit what you collect: • Text • Number • Date • Checkbox • Single Select • Multi Select • URL • Place • File • Created Time • Last Edited Time • Formula (Clastly Pro) • Relation (Clastly Pro) • Rollup (Clastly Pro) Customize your views: • List - Scan details quickly • Table - Compare and edit details in columns • Gallery - Browse records with photos • Masonry - Make the most of photos in different sizes • Board - Organize by status or category • Calendar - See dated records by month, week or day • Map - See saved places on a map Group, sort, and filter using your fields. Search within a collection or across collections, find records in Spotlight, and choose which details appear in each row. Group text by first letter, numbers by range, and dates by day, week, month, or year, and hide empty groups. Set end dates to record a period, and display numbers as currency, percentages or with a unit. You can also set a notification for a date and time you specify. Choose a notification or an urgent reminder that sounds an alarm (iOS or iPadOS 26 or later). One view per collection, all layouts, grouping, sorting and filtering remain free. Import and export data: You can also import CSV and TSV files to create collections. Collections created in Clastly can be exported as CSV. Back up all your data together and restore it when you need it. Capture from anywhere: Save photos, web pages, text, files, and Apple Maps places to Clastly from the share sheet. Home Screen widgets show a calendar, recent records, and collection counts, while widgets, the Lock Screen, and Control Center give you quick ways to add a new record. Clastly also works with Siri and Shortcuts. Automate opening collections, adding and editing records, updating fields, and searching your data. Private and synced: No ads. No social features. Your collections sync between iPhone and iPad with iCloud. With Clastly Pro (subscription), save multiple named views for each collection and switch between them. Search text in photos, scans and PDFs. Use formulas to calculate costs and dates, combine text, or show results based on conditions. View totals and averages for each group. Link records across collections with relations, and use rollups to total, average, or count values from linked records. Not for likes, but for yourself. Build a library just to collect and enjoy looking back at your treasures. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.clastly.com/privacy/
Mellow
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Thoughts do not always arrive as finished text. Sometimes you want to say a message better, capture an idea, or put an important task on your schedule. Mellow is an AI writing and capture assistant built around voice and text. You explicitly choose Rewrite, Quick Note, or Arrange. Mellow never guesses the mode, sends a message, or writes to your calendar automatically. THREE WAYS TO USE MELLOW • Rewrite: preserve your intent while making a message clearer and more considerate for the audience you choose • Quick Note: faithfully turn spontaneous ideas and observations into a readable title and natural paragraphs • Arrange: extract the task, relative time, place, and things to bring into a draft card, then decide whether to add it to Calendar, Reminders, or an alarm KEY FEATURES • Voice or text input: choose hold-to-talk or tap-to-start/stop, or stay entirely in text • Scene templates: control audience, tone, and writing guidelines, or create your own scene • Knowledge Base: save specialist terms, names, and common variants for consistent use in speech recognition, Rewrite, Quick Note, and Arrange; optionally sync them across signed-in Mac, iPhone, and iPad devices • Share extension: send selected text to Mellow from the system Share menu • Saving and connectors: use the system share sheet for Apple Notes, or sign in and explicitly save a selected Quick Note to Notion • Local records: Rewrite, Quick Note, and Arrange records stay on your device and can be deleted or disabled YOU STAY IN CONTROL Mellow never sends messages or creates schedules on its own. Every AI-generated result is labeled and shown to you first, so you can review, edit, copy, share, or save it. PRIVACY Mellow does not upload or store microphone audio. Only text and necessary context you explicitly submit to Rewrite, Quick Note, or Arrange is sent to Mellow Cloud. Knowledge Base entries stay local by default and can sync with your account when enabled. Connecting Notion sends no note by itself; Mellow sends a title and body only after you explicitly save that note. Mellow helps you put down what you want to say, what you just thought of, and what you need to do.
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Verdict
The clearest difference is in-app purchases: Mellow at none against Clastly's 2. On price, update cadence, 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. Clastly sells 2 in-app purchases, starting at $2.99 per month. Mellow asks for nothing beyond the download.
Clastly ships an update every 11 days, Mellow every 10 days. Both last shipped on October 28, 2026.
| Parameter | Clastly | Mellow |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 11 days | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 38 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Soji Takahashi | 海鑫 李 |
In-app purchases
Clastly
- Pro Plan (Monthly)7 Days trial$2.991 Month
- Pro Plan (Yearly)7 Days trial$19.991 Year
Mellow
No in-app purchases









