Unit Converter vs COLLEMO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Unit Converter
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A simple and easy-to-use unit converter app. Quickly and accurately convert commonly used units such as length, weight, temperature, area, volume, and speed. Just enter a number and it will automatically convert to the selected unit in real time. With a clean UI and history feature, anyone can use it intuitively. ● Key Features [Instant Unit Conversion] - Automatically converts as you type - Supports length / weight / temperature / area / volume / speed - Quickly select commonly used units - Real-time results [Supported Units] - Length: centimeter / meter / inch / foot, etc. - Weight: gram / kilogram / ounce / pound, etc. - Temperature: Celsius (℃) / Fahrenheit (℉) - Area: square meter / square foot / square mile / are, etc. - Volume: liter / milliliter / gallon, etc. - Speed: km/h / mph, etc. [Simple and Clean UI] - Minimal design focused on essential information - Large, easy-to-read text - Intuitive one-tap unit switching [Flexible History Management] - View conversion history in a list - Supports automatic or manual saving - Easily copy or delete history items [Quick Copy Feature] - Copy conversion results with a single tap [Customizable Settings] - Adjust decimal precision - Enable/disable haptic feedback - Choose how history is recorded [No Login Required] - No account needed — start using immediately From everyday calculations to work and study, enjoy a simple and stress-free unit conversion experience.
COLLEMO
Track your fan merchandise collection, including photocards, plushies, and more. Log items by bias, status, and quantity, add photos, and view collection stats. Helps prevent duplicate purchases and organizes your fan goods.
- Log items by bias, status, and quantity
- Add up to 10 photos per item
- Prevent duplicate purchases
- View collection stats by bias and category
- Filter and search collection items
- Customizable categories and tags
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Photocards, acrylic stands, buttons, plushies. COLLEMO logs your growing pile of fan merch with photos, by bias and by type, so you always know what you own, how many of each, and how much you have spent. Free, with no limit on how many items you can add. No account needed. - Log by bias, status and quantity Tag each item with your bias and filter your collection by bias. Choose from four statuses: Owned, Preordered / Not Yet Arrived, Wishlist and For Trade. Own more than one of the same item? Record the quantity, shown as ×2 right on the list. Add up to 10 photos per item, or let an emoji and color stand in. - Check before you double-buy When you add an item, COLLEMO shows how many with the same name you already have. A handy check before buying more random or blind merch. - Stats See your items on hand, preorders, total spent and wishlist at a glance, with breakdowns by bias, by category and by month. - Browse and filter Switch between grid and list view. Filter by bias, category and status. Select several items and delete them at once. Pin the ones you look at most to Favorites. - What you can record Title, bias, status, quantity, category, condition, tags, description, purchase price, current value, purchase date, place of purchase, storage location and URL. - Search Search across titles, notes, tags, categories, biases, storage locations and places of purchase. - Notes alongside your merch Jot down trade arrangements or items you missed out on, in the same timeline. Notes can be linked to an item. - Categories made for fan merch Acrylic Stands, Buttons, Photocards & Trading Cards, Plushies, Paper Goods, and CDs & Discs come ready to use. Add and edit categories and tags freely. - Your data Your records are saved on your device. No account needed. Export your items, notes and photos as a backup at any time. Available in 35 languages. A banner ad is shown at the bottom of the screen to keep the app free.
Screenshots
Verdict
Unit Converter and COLLEMO are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
Unit Converter ships an update every 2 months, COLLEMO every 5 weeks. Both last shipped on October 31, 2026.
| Parameter | Unit Converter | COLLEMO |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | MITSUKO MARGOT KUBOTA ONO | KeiK LLC |
In-app purchases
Unit Converter
No in-app purchases
COLLEMO
No in-app purchases
Questions
Is Unit Converter free?
Is COLLEMO free?
Do Unit Converter or COLLEMO have ads?
Which is updated more often, Unit Converter or COLLEMO?
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