Lumis Carte · by Altaria_Nest
Know before
you commit.
A smart price companion for Pokemon TCG collectors. Check any card against real market data — before you bid, buy, or sell.
✦ Quick start guide
Getting started
📲

Add to your home screen

Open the link in your browser → tap Share → Add to Home Screen. Works on iOS and Android — no App Store needed.

How to use it
1

Enter the card details

Choose Single or Slab, then type the card name and set. For slabs, pick the grading company (PSA, BGS, CGC, SGC, ACE) and enter the grade. Look up recent sold prices on ALT, SNKRDUNK, or Yuyutei and enter them in — the app averages and converts everything automatically.

💡 Tap the shortcut buttons next to each platform name to open them directly 💡 Tap Add tags to label the card (e.g. Grail, Watching, M2A) before saving to Watchlist 💡 Optionally tell the app how often you see this card — it will help provide context and advise you accordingly
2

Pick your mode and enter the price

Tap I'm buying, I'm selling, or Auction, key in the price, and hit Check. The app instantly shows your signal and a commentary line tailored to the situation.

3

Save and move on

Add an optional note, then tap Clear & Save to History to log the check and start fresh.

💡 You can also Save to Watchlist before checking — great for prepping before a card show
The modes
🛒

I'm buying

Evaluating a listing or card show purchase. Enter price in SGD.

🏪

I'm selling

A vendor is making you an offer. See if it's fair vs selling independently.

🎙️

Auction

Sourcing from live stream auctions. Enter bid in SGD or CNY — enable in Settings.

💡 Auction mode supports both SGD and CNY bids — set your preferred default in Settings.

Price reference platforms
📊

ALT.xyz

Up to 5 recent sales, averaged automatically

USD
🎌

SNKRDUNK

Up to 5 recent sales, averaged automatically

USD
🏪

Yuyutei

Single retail price entry

JPY
💳

PriceCharting

Single price entry, enable in Settings

USD
🃏

TCGplayer

Single price entry, enable in Settings

USD

All prices convert automatically to SGD, USD, CNY, and JPY using live exchange rates. Toggle any platform on or off per check using the quick pills in the Checker.

Single or Slab?
🃏

Single

A raw, ungraded card. Select this for any card that hasn't been submitted to a grading company.

Default selection

Slab

A professionally graded card sealed in a hard plastic case. Choose the grading company and enter the grade — a PSA 9 and a PSA 10 are different assets entirely.

Supported grading companies:

PSA BGS CGC SGC ACE Other

Half grades (e.g. CGC 9.5, BGS 9.5) are fully supported — just type the grade value freely. The type and grade are stored on each Watchlist and Tracker entry and shown as a small badge so your lists stay clear at a glance.

Reading the signal

Good buy — at or below your threshold

You're buying below market. Pull the trigger with confidence.

~

Borderline — between threshold and 95%

Reasonably priced but not a steal. Your call — the app will help you think it through.

Above market — above 95%

Paying at or above market rate. Not always wrong — but worth a moment of reflection.

On borderline or above market signals, the app may ask you a follow-up question. It's optional — but worth answering if you're struggling to decide.

More to explore

Single & Slab types

Tag every entry as a Single or a Slab with grader and grade. Shows as a badge in your Watchlist and Tracker — edit anytime from the pencil panel or Tracker detail view.

👑

Grail mode

For cards you'd pay a premium for. Raises your threshold for that check only — toggle it on the result screen.

🔖

Watchlist

Pre-load cards with prices before a show. At the table, tap Load → key in the vendor price → check instantly.

🏷️

Watchlist tags

Label cards with custom tags like Grail, Watching, or M2A. Filter your list by tag with one tap. Edit tags anytime via the pencil icon on each card.

☑️

Multi-select

Tap Select to enter selection mode. Checkbox each card you want, then bulk delete in one go. Select All works with your current search and tag filter.

📤

Share watchlist

Export your watchlist as a file and share via WhatsApp. Friends import it on their own device.

⚙️

Threshold presets

Conservative 85% · Balanced 90% · Aggressive 95% · Custom. Set in Settings to match your mood.

📝

Quick notes

Jot context on any result — seller details, card condition, negotiation reminders.

🔍

Search

Filter your Watchlist or History instantly as you type. Appears automatically once you have 5+ items.

📈

Price Tracker

Follow cards over time. Each update adds a dated data point — the app plots a colour-coded line chart per platform so you can see where prices are heading.

✏️

Watchlist price editing

Tap the pencil icon on any Watchlist card to update prices in a focused panel. Pre-filled from last save — change only what moved. Syncs to Tracker automatically.

🔃

Watchlist sorting

Sort by date added, A→Z, or by tag group. Tag group is handy for quickly surfacing all your Grail or M2A cards together.

🧠

Smart tab memory

App reopens on whichever tab you were last on. Tracker regulars land in Tracker; Checker users land in Checker — no navigation needed each session.

Using the tracker
1

Add a card

Go to your Watchlist and tap the chart icon on any card to send it to Tracker instantly — prices and tags carry over. Or tap Add card in the Tracker tab to start fresh.

2

Update weekly via Watchlist

Tap the pencil icon on a Watchlist card to open the price update panel. Previous prices are pre-filled — update only what changed and tap Save prices. Watchlist and Tracker both update in one action.

💡 This is the fastest weekly routine — one panel, one save, done.
3

Didn't track in Week 1?

No problem. The first time you edit a Watchlist card that isn't tracked yet, you'll see a prompt: "Start tracking this card?" Say yes and your original Week 1 prices are backfilled automatically as the first data point — your chart starts from when you first added the card, not from today.

4

Read the chart

Each platform gets its own colour-coded line — ALT (blue), SNKR (purple), YYT (pink), PC (teal), TCGplayer (orange). Toggle platforms above the chart to compare movements side by side and spot when markets diverge.

5

Open in Checker

From the Tracker detail view, tap Open in Checker to pre-fill the Checker with the last recorded prices. Ready to check a new listing without re-entering everything.

A few tips

Tracking slabs separately: A PSA 9 and a PSA 10 of the same card can be worlds apart in price — always save them as separate entries with the grade filled in. The badge in your list makes it instantly clear which slab you're looking at.

📈

Weekly price tracking: Watchlist → pencil icon → update only what changed → Save. Tracker updates silently in the background. One ritual, everything in sync.

Clearing stale prices: Each platform column in the price form has a small ✕ clear button. Wipe just that market's entries when they're outdated — the other platforms stay untouched.

📋

Before a card show: Save cards you're hunting to your Watchlist at home with prices pre-filled. At the table, tap Load → enter the vendor price → done in seconds.

At a live auction: Eyeball the average from recent sales and enter one number per platform instead of all 5. Faster when the bidding heats up.

🔀

Check all platforms: Toggle between ALT, SNKRD, and YYT — prices can differ significantly for the same card across markets.

👁️

Collapsed input bar: Once you've entered a price and collapsed the panel, the bar shows your entered price at a glance — so you always know what you're checking against.

🏷️

Organise your watchlist: Tag cards before saving — Grail, Watching, M2A, whatever works for you. Use the tag filter bar to zero in on one group instantly, or multi-select to clear out old entries in bulk.

👑

Chasing something special: Set a Grail % in Settings for cards you'd stretch your budget for. It activates per check — your regular threshold stays untouched.