LSTclock vs Touch
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Local sidereal time display
- Julian Date calculation
- Supports multiple registered locations
- Location sync between iPhone and Apple Watch
- Date and time specific calculations
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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).
Touch
Control your astrophotography sessions remotely from your mobile device or Mac. Manage imaging, focus, guiding, and polar alignment. This open-source tool enhances your workflow without ads or in-app purchases.
- Remote imaging session launch
- Focus control
- Guiding performance monitoring
- Three Point Polar Alignment
- Connected device control
- Open source
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Touch-N-Stars brings the core features of the popular astrophotography software N.I.N.A. right to your phone, tablet, or Apple Silicon Mac. Start imaging sessions, adjust focus, monitor guiding, or perform a Three Point Polar Alignment – all from the palm of your hand. Key Features: - Launch imaging sessions and control focus remotely - Monitor guiding performance in real time - Perform Three Point Polar Alignment (requires N.I.N.A. v2.2.2.0+) - Control all connected devices such as the dome or flat panel - 100% open source. No ads. No in-app purchases. Requirements: - A running N.I.N.A. instance on your imaging PC - Advanced API Plugin enabled (Port 1888, API v2) - Touch'N'Stars Plugin Touch-N-Stars is a companion tool – not a full replacement for the desktop experience. Enhance your astrophotography workflow and stay flexible – wherever you are.
Screenshots
Verdict
The clearest difference is review sentiment: Touch at 100% against LSTclock's 55%. Touch also leads on rating (5.0 vs 3.8) and update cadence (fortnightly vs every 2 months). On price, ratings volume, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Touch holds the better App Store score, 5.0 against 3.8. Both are backed by a comparable volume of ratings — 10 and 6 respectively. Written reviews point the same way: 55% of LSTclock's written reviews are positive against 100% of Touch's.
LSTclock ships an update every 2 months, Touch fortnightly. The most recent releases landed on September 9, 2026 and September 10, 2026 respectively.
| Parameter | LSTclock | Touch |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (10 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 54.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 10 — better | 6 |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPad |
| Requires iOS | 17.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 15 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Tsuyoshi Sawada | Johannes Maier |
Customer experience
LSTclock
Touch
In-app purchases
LSTclock
No in-app purchases
Touch
No in-app purchases
