Comparison

Zone Meter vs Time Warp Scan

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

Head to head
About

Zone Meter

Features
Read full description

Zone Meter is a professional light meter for photographers who shoot manual - on film, with legacy lenses, or in the studio. Point your iPhone at a scene and Zone Meter instantly reads the light from the camera sensor, calculating exposure values in real time. Scroll the drum wheels to set your aperture, shutter speed, or ISO, and Zone Meter works out the third value for you. LIGHT METER - Live EV reading from the iPhone camera sensor - Four metering modes: Aperture Priority (Av), Shutter Priority (Tv), ISO Priority, and Manual (M) - Classic drum-roller wheel pickers for aperture, shutter speed, and ISO - Tap anywhere on the live preview to spot-meter a specific area of the scene - Switch between lenses (0.5x, 1x, 2x, 5x) to meter a distant subject with the telephoto - Live colour temperature reading with descriptive label (Tungsten, Daylight, Cloudy, Shade) - EV condition display from Very Dark to Very Bright HISTOGRAM - Live luminance histogram overlaid on the camera preview - tap the chart icon to show or hide - Shadows on the left, highlights on the right - just like every other histogram you know - Colour-coded bars: blue for shadows, white for midtones, amber for highlights - Clip indicators warn when shadows or highlights are being lost - In Manual mode, the histogram shifts left or right to predict how your chosen settings will affect the tonal distribution MANUAL MODE - Set aperture, shutter speed, and ISO independently - nothing is computed or locked - Exposure delta bar shows how far your settings deviate from the metered value - Bar shifts left for underexposure, right for overexposure - consistent with the histogram - Contextual label: Correct exposure, Overexposed by 1.3 stops, Underexposed by 2 stops - Use with the histogram to dial in exposure before you shoot ND FILTER CALCULATOR - Calculates long-exposure shutter speed for any ND filter - Presets for all standard filters: ND2 through ND32000, Little Stopper, Big Stopper, Super Stopper - Custom stop input - Uses the live meter reading or a manually chosen base shutter speed - Warns when exposure exceeds 30 seconds (Bulb mode required) DEPTH OF FIELD CALCULATOR - Hyperfocal distance calculator for any lens and sensor format - 8 sensor formats: Full Frame, APS-C (Canon and Nikon/Sony), Micro 4/3, 1-inch, Medium Format, 4x5, 8x10 - 18 focal length presets from 14mm to 600mm - Shows near focus limit, far focus limit, and total depth of field - Visual range bar showing subject position relative to hyperfocal distance - Contextual advice: tells you exactly how far to refocus to bring infinity sharp STROBE CALCULATOR - Guide number calculator for flash and studio strobes - Presets for speedlights and studio heads from 100Ws to 1200Ws - 8 power settings from Full to 1/128 - Solve for aperture (given distance) or distance (given aperture) - ISO-aware: guide numbers automatically adjust for any ISO - Fill light ratio calculator: instantly shows the aperture difference for 1:1 through 16:1 ratios READING HISTORY - Save and name any meter or strobe reading - Add notes to any saved reading - Share individual readings or export the full history - Organised by name, date, light condition, and exposure values DESIGNED FOR PHOTOGRAPHERS - Clean dark interface designed for use in any light - Metric or imperial measurements (set in Help) - Available in English, Japanese, German, French, Spanish, Italian, and Korean - Full help documentation built in: explains EV, hyperfocal distance, guide numbers, and more - No ads. No subscription. No account required. Zone Meter is the meter you always have with you.

About

Time Warp Scan

Create surreal photos and videos using a live blue-line time warp effect. This app processes all camera frames on your device, offering full control over scan direction, duration, and style without ads or watermarks.

Highlights
  • Live blue-line time warp effect
  • Adjustable scan direction and duration
  • Multiple scan-line styles
  • Photo and video capture
  • Built-in pose guides
  • Save and share creations
Features
Read full description

BEND TIME. BREAK REALITY. A live scan line freezes each slice of the frame as it passes. Hold still, then move at the right moment. The warp is captured on your iPhone, with no editing timeline. FREE Classic, Split, and Zipper. Shoot and save photos. No ads, no watermark, and no account. TIME WARP PRO Weekly, monthly, or yearly. Monthly includes a 3-day trial. Pro adds 10 modes, video, Live Photo, GIF, the full editor, and 60 fps. The price is shown before you subscribe. Cancel anytime in Settings. FREE MODES Classic — one line sweeps across and freezes time behind it. Split — two lines race apart from a point you tap. Zipper — two lines close in from opposite edges. PRO MODES Portal — a ring of frozen time grows outward. Black Hole — time collapses toward one point. Vortex — a beam sweeps in a circle. Liquid — a rolling wave. Melt — frozen time drips downward. Heart — a heart opens from a point you tap. Star — a five-point star spreads across the frame. Mosaic — tiles freeze at different moments. Time Brush — paint with your finger to freeze anything, then tap Done. Clones — freeze several poses of yourself in one shot. Each pose is marked with a flash. SCAN CONTROLS Free: Up to 8 directions, including diagonals, depending on the mode. Durations of 3, 5, 8, 12, 16, 24, or 32 seconds. Speed curves: Steady, Smooth, Rush, Brake, and Beat. Countdown off, or 3, 5, or 10 seconds. Pause and resume during a scan. Tap to place the center on Split, Zipper, and the point-based Pro modes. Scan-line styles: Electric, Prism, Solar, Neon, Laser, Aurora, Glitch, Holo, Ghost, or hidden. Freeze tint on the frozen past only: Off, Mono, Ice, Memory, X-Ray, or Neon. Front or back camera, torch, tap to focus, and pinch to zoom. Mirror front-camera selfies. Grid, and a ghost of your last warp. Ring light raises screen brightness for dark selfies. Start with an open palm, or with the volume buttons. 30 fps capture. Pro: 60 fps capture. SAVING Free: Save a warp photo to Photos. Crop to 4:5 or square, rotate, and adjust before saving. Looks: Original, Vivid, Mono, and Noir. Pro: Record video, with microphone audio if you allow it. Export video, a Live Photo, or a GIF. Share with any compatible app. Looks: Vintage, Cyber, Golden, Frost, Dream, Thermal, VHS, and Pop. Captions, music, and playback at 0.5×, 1×, 2×, and 4×. Free and Pro saves have no watermark. ALSO FREE Recipes show the pose, then apply that camera setup in one tap. A Pro recipe asks you to subscribe first. Daily challenges, streaks, and badges. Studio keeps saved warps in the app for replay, favorites, and deletion. Deleting one does not remove the Photos original. Siri, the Action button, and Control Center. PRIVATE BY DESIGN Camera and microphone frames stay on your iPhone. Clones and palm-to-start use on-device vision. Nothing is uploaded. No account, no ads SDK, no analytics SDK, and no cross-app tracking. Photos access is add-only. The microphone is optional and is used only for video with sound. Download Time Warp Scan and bend the next moment your way. Privacy Policy: https://sites.google.com/view/sv56developer/privacy-policy Terms of Use (EULA): www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Zone Meter4 screens
Time Warp Scan4 screens

Verdict

The call

The clearest difference is update cadence: Time Warp Scan at every 6 days against Zone Meter's every 2 months. On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Zone Meter ships an update every 2 months, Time Warp Scan every 6 days. The most recent releases landed on October 25, 2026 and November 6, 2026 respectively.

Scorecard1 real difference · 9 level
Zone Meter versus Time Warp Scan: the parameters behind the verdict, then further details
ParameterZone MeterTime Warp Scan
PriceFreeFree
Rating—4.4 (36 ratings) — better
Positive reviews—80.0% of reviews
Number of ratings—36 — better
Update frequencyEvery 2 monthsEvery 6 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhoneiPhone
Requires iOS16.0 — better17.0
Further details — not scored
Size2 MB48 MB
Age rating4+4+
DeveloperGreg AndersonHa Quyen Ho Thi

In-app purchases

None

Zone Meter

No in-app purchases

None

Time Warp Scan

No in-app purchases

Questions

Is Zone Meter free?
Zone Meter is free to download, with no in-app purchases.
Is Time Warp Scan free?
Time Warp Scan is free to download, with no in-app purchases.
Do Zone Meter or Time Warp Scan have ads?
Neither Zone Meter nor Time Warp Scan shows ads.
Which is updated more often, Zone Meter or Time Warp Scan?
Zone Meter ships an update every 2 months, and Time Warp Scan every 6 days. Most recently, Zone Meter was updated on October 25, 2026 and Time Warp Scan on November 6, 2026.

Other comparisons