Comparison

LSTclock vs Tagtory

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

Head to head
About

LSTclock

This utility app displays local sidereal time for registered locations on iOS, iPadOS, and watchOS. It can also calculate sidereal time and Julian Date for any date and time, and sync locations between devices.

Highlights
  • Local sidereal time display
  • Julian Date calculation
  • Supports multiple registered locations
  • Location sync between iPhone and Apple Watch
  • Date and time specific calculations
Features
Read full description

LSTclock is an iOS/iPadOS/watchOS app that displays the local sidereal time (LST) at registered location(s). On iOS/iPadOS, it can also calculate LST and Julian Date for any date and time. The list of locations can be synced between iPhone and paired Apple Watch(es).

About

Tagtory

Read full description

Tagtory is the easiest way to organize your physical belongings using NFC tags. SCAN & ORGANIZE Simply tap your iPhone on an NFC tag to instantly see what's inside that box, drawer, or container. No more guessing or opening every bin to find what you need. REGISTER CUSTOM TAGS Write NFC tags with your own data. Label storage containers, tool boxes, moving boxes, and more. Each tag links to a detailed item record with photos, notes, and location. SMART ORGANIZATION • Group items into categories with custom icons and colors • Add photos to remember what things look like • Track scan locations on a map with GPS • Drag and drop to reorder items and groups • Search across all your items instantly ICLOUD BACKUP & RESTORE Back up your entire organization system to iCloud and restore it anytime. Choose from three restore modes — keep local data, use iCloud data, or do a full restore. Your data is always safe in your private iCloud account. SHARE WITH OTHERS Share items with family members or roommates using peer-to-peer sharing — including photos. Perfect for shared storage spaces. No internet required. BUILT FOR YOU • Guided onboarding to get started in seconds • Light and dark mode support • NFC sticker buying guide with product recommendations • Works completely offline — no account or internet needed PERFECT FOR • Home organization and decluttering • Moving and packing • Garage and workshop storage • Craft and hobby supplies • Seasonal decoration storage • Office supply management FREE TO START Get started with up to 10 NFC tags, 3 groups, and 1 photo per item — free forever. Upgrade to Tagtory Pro for unlimited tags, groups, photos, and iCloud backup. PRIVACY FIRST All your data stays on your device and in your private iCloud account. We don't operate servers, run analytics, or track you. Your information is yours alone. Download Tagtory today and finally know exactly where everything is! Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://tagtory.app/privacy

Screenshots

LSTclock4 screens
Tagtory4 screens

Verdict

The call

The clearest difference is in-app purchases: LSTclock at none against Tagtory's 3. LSTclock also leads on device support (3 vs 1). Tagtory's advantage is update cadence (every 2 days vs every 2 months). On price, ads 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. Tagtory sells 3 in-app purchases, starting at $2.99 per month. LSTclock asks for nothing beyond the download.

UpkeepUpdate frequency

LSTclock ships an update every 2 months, Tagtory every 2 days. The most recent releases landed on September 9, 2026 and September 19, 2026 respectively.

Scorecard3 real differences · 7 level
LSTclock versus Tagtory: the parameters behind the verdict, then further details
ParameterLSTclockTagtory
PriceFreeFree
Rating3.8 (10 ratings) — better—
Positive reviews54.5% of reviews—
Number of ratings10 — better—
Update frequencyEvery 2 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS17.0 — better18.0
Further details — not scored
Size15 MB12 MB
Age rating4+4+
DeveloperTsuyoshi SawadaZEYI YAN

In-app purchases

None

LSTclock

No in-app purchases

3 purchases

Tagtory

Subscriptions2
  • Tagtory Pro Monthly1 Month trial$2.991 Month
  • Tagtory Pro Yearly$24.991 Year
One-time1
  • Tagtory Pro Lifetime$39.99

Questions

Is LSTclock free?
LSTclock is free to download, with no in-app purchases.
Is Tagtory free?
Tagtory is free to download, with in-app purchases available.
Do LSTclock or Tagtory have ads?
Neither LSTclock nor Tagtory shows ads.
Which is updated more often, LSTclock or Tagtory?
LSTclock ships an update every 2 months, and Tagtory every 2 days. Most recently, LSTclock was updated on September 9, 2026 and Tagtory on September 19, 2026.

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