Comparison

Cassi Telescope Viewer vs SPECTRAL

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

Head to head
About

Cassi Telescope Viewer

This app simplifies telescope viewing for amateur astronomers using smartphone mounts. It corrects image orientation and aids in locating celestial objects.

Highlights
  • Smartphone mount compatibility
  • 360-degree image inversion
  • Assisted object seeking
  • Easy-to-use interface
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Cassi Viewer is designed for amateur telescopes with smartphone mounts. It inverts the image 360 degrees to act like a prism, while making object seeking easier.

About

SPECTRAL

Transform your device into a ghost hunting tool with an EMF radar, spirit box, and SLS camera. Analyze paranormal activity with real sensor data and explore haunted locations through interactive case files. Record and share your findings with a community of investigators.

Highlights
  • EMF Radar with live readings
  • Spirit Box with multiple voice channels
  • SLS Camera with human-shaped figure detection
  • EVP Recorder with anomaly tagging
  • Séance Board for communication
  • Interactive haunted case files
  • Record and share investigations
Features
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SPECTRAL turns your iPhone into a ghost hunting kit: EMF radar, spirit box, SLS camera, EVP recorder and séance board in one app. It reads your phone's REAL magnetometer, motion sensors and microphone and turns them into atmospheric investigation tools. SLS CAMERA Maps human-shaped figures onto your camera feed in real time. Sometimes it finds you. Sometimes it finds something smaller in the corner that walks away on its own. Skeletons are saved into your photos and videos. EMF RADAR Live readings from your phone's magnetometer on a signal graph. The meter climbs as fields shift and blips appear on the radar. Temperature, voltage and frequency readouts track anomalies. SPIRIT BOX 6 channels, each with its own voice and word bank: STANDARD, DEMON, CHILD SPIRIT, SOLDIER'S ECHO, SÉANCE and ANCIENT. Speak out loud and entities answer when they hear you. Capture and share any word the instant it comes through. EVP RECORDER Record sessions from the room around you. Peaks are tagged as anomalies automatically, so you can jump to the moment something answered. SÉANCE BOARD Ask a question aloud and watch the planchette spell out the reply, letter by letter. VISION CAMERA Seven modes, including Green Glow, Heat Map Colors, Blacklight Glow, Ectoplasm, Shadow Veil and Specter Mode. Entities manifest without warning and orbs drift through frame. Every photo gets an entity type, threat level and confidence score. RECORD & SHARE Film your hunt with overlays, skeletons and orbs and share it to your feed. Standard clips run 30 seconds with a watermark; PRO records up to 3 minutes without one. INVESTIGATIONS 30+ case files in haunted places: abandoned asylums, forgotten chapels, sunken parishes, lighthouses. Each has a backstory, zones to sweep and entities to identify. A new case rotates in daily and one stays open to everyone each week. Close a case to get an animated Case Closed card. EVIDENCE JOURNAL Every capture is archived and classified. Climb 4 investigator ranks, keep your daily streak, complete daily missions and unlock radar themes in the Season Pass. Halloween, full moons and the 3 AM witching hour intensify activity. SPECTRAL PRO Every channel, filter and case, the custom case builder, 3-minute video without a watermark, longer recording sessions, Deadwave mode, audio effects, entity forensics, sensor calibration and no ads. Monthly, yearly or a one-time Lifetime purchase. Monthly and yearly Pro are auto-renewing subscriptions. Payment is charged to your Apple ID account at confirmation of purchase. A subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours before the period ends. Manage or cancel subscriptions in your Apple ID account settings. Lifetime is a one-time purchase and does not renew. Terms of Use (EULA): https://peerware.site/spectral-terms Privacy Policy: https://peerware.site/spectral-privacy-policy WARNING Eerie audio, sudden visual effects and atmospheric horror. Not recommended for young children or anyone sensitive to jump scares. DISCLAIMER SPECTRAL is an entertainment app. It reads real device sensors, but readings are interpreted for atmospheric effect and do not detect actual paranormal activity. We make no scientific claims about ghosts or spirit communication.

Screenshots

Cassi Telescope Viewer3 screens
SPECTRAL4 screens

Verdict

The call

The clearest difference is in-app purchases: Cassi Telescope Viewer at none against SPECTRAL's 10. Cassi Telescope Viewer also leads on ads (none vs shown) and rating (5.0 vs 4.8). SPECTRAL's advantage is ratings volume (4 vs 1) and device support (3 vs 1). On price and update cadence 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. SPECTRAL sells 10 in-app purchases, starting at $2.99 per month. Cassi Telescope Viewer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Cassi Telescope Viewer holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 31, 2026 and November 9, 2026 respectively.

Scorecard7 real differences · 2 level
Cassi Telescope Viewer versus SPECTRAL: the parameters behind the verdict, then further details
ParameterCassi Telescope ViewerSPECTRAL
PriceFreeFree
Rating5.0 (1 ratings) — better4.8 (4 ratings)
Number of ratings14 — better
Update frequencyEvery 5 daysEvery 5 days
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS26.215.0 — better
Further details — not scored
Size1 MB54 MB
Age rating4+9+
DeveloperCassi Telescope LLCPeerware

Customer experience

Cassi Telescope Viewer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

SPECTRAL

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Cassi Telescope Viewer

No in-app purchases

10 purchases

SPECTRAL

Subscriptions2
  • Spectral Pro Monthly$2.991 Month
  • Spectral Pro Annual$11.991 Year
One-time8
  • Shadow & Specter Filter Pack$0.99
  • Ecto Detector Filter$0.99
  • Child Spirit Channel$0.99
Show 5 more
  • Demon Channel$0.99
  • Soldier's Echo Channel$0.99
  • UV Spectrum Filter$0.99
  • Season Pass Premium$2.99
  • Spectral Pro Lifetime$24.99

Questions

Is Cassi Telescope Viewer free?
Cassi Telescope Viewer is free to download, with no in-app purchases.
Is SPECTRAL free?
SPECTRAL is free to download, with in-app purchases available.
Which has better reviews, Cassi Telescope Viewer or SPECTRAL?
Cassi Telescope Viewer is rated higher. Cassi Telescope Viewer averages 5.0 out of 5 from 1 ratings, while SPECTRAL averages 4.8 from 4 ratings.
Do Cassi Telescope Viewer or SPECTRAL have ads?
SPECTRAL shows ads; Cassi Telescope Viewer does not.
Which is updated more often, Cassi Telescope Viewer or SPECTRAL?
Cassi Telescope Viewer ships an update every 5 days, and SPECTRAL every 5 days. Most recently, Cassi Telescope Viewer was updated on October 31, 2026 and SPECTRAL on November 9, 2026.

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