Comparison

Kessler kOS vs MixEffect Pro

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

Head to head
About

Kessler kOS

This advanced software provides precise wireless control for professional camera motion systems. It enables users to create complex, repeatable camera movements for various video and photography applications through an intuitive interface.

Highlights
  • Ultra-refined keyframe control
  • Wireless iPad control
  • Timelapse and stop motion modes
  • Complex keyframe movement
  • Editable keyframes
  • Repeatable camera moves
  • Event mode for live scenarios
Features
Read full description

kOS is an advanced camera motion control software that unlocks the highest level of control and features for Kessler’s industry-leading motion control systems including Second Shooter Plus, Second Shooter Pro, and the newest motion control system CineShooter. This app allows for ultra-refined keyframe based control in a powerful and easy-to-use interface for applications such as timelapse, stop motion, live video/cinematography, event video, and advanced photography controlled wirelessly via iPad. CONTROL ANY MOTION Live, looping, stop motion, timelapse, GigaPixel* and Event Mode camera moves at your fingertips. DIGITAL KEYRAMING Simply move each axis into position and hit record. kOS saves your exact positioning for 100% repeatable moves. WIFI CONNECTIVITY Your CineShooter, Second Shooter Pro, or Second Shooter Plus device creates its own WiFi network that you can connect your device to instantly. COMPLEX KEYFRAME MOVEMENT Create up to 20 keyframes at once for ultra complex movement. EASY KEYFRAME SMOOTHING Add and manipulate curves to your moves for ease-in and ease-out motion. Also, link each side of the keyframe to match. EDITABLE KEYFRAMES No need to re-record the move if it's not exactly what you want. Edit one or all axes and keyframes into the perfect position. Featuring incremental, exact motor position plus tap and move keyframe adjustments. REPEATABILITY Repeat the exact same move over and over again at the same speed or variable speeds depending on the application. DELAY BY DATE/TIME Not going to be around when your move needs to start? No problem. Easily set a date/time or fixed amount of time to have your move begin. kOS takes care of the rest. FLASH MARK/BLOOP Sync up your moves easily via the built-in flash marks with adjustable delay. PRE & POST-PHOTOS (TIMELAPSE MODE) Easily add a series of head or tail photos to your timelapse move. GO TO POSITION Set minimum and maximum ranges on each axis (ie. slider 0" to 32") and go to any position by entering a value. LOAD & GO This feature allows for pre-loading a move so that you are able to start instantly whenever you are ready. CAMERA PRE and POST ROLL Trigger your camera to start recording any amount of time before the move begins and when to stop after the move ends. ANALOG CONTROL PANEL Manually control several axes live with the built in analog controller. EVENT MODE Event mode is mainly intended for live events or scenarios where exact position recalling on-the-fly is needed. For example, if you are filming a live concert, you can have different positions on stage saved. You can move easily from the drummer, to the guitarist, to the lead singer and so forth. This mode is also great for repeatedly hitting actor marks on set. GIGAPIXEL GigaPixel is traditionally used for 360 degree virtual tours, panoramic photographs or GigaPixel images which are extremely high resolution photographs that are compiled of many lower resolution photographs. GRAPH EXPANSION Expand the graph with one touch when precise key framing is needed. SCRUB THROUGH MOVE Need to edit a key frame or see when the camera will be in a certain position? Use the scrub feature to instantly move to a desired position. LOOPING Looping is made easy with kOS. Simply select one-time or continuous looping. CAMERA CONTROL Set CineShooter, Second Shooter Pro, Second Shooter Plus device to trigger or control your camera’s exposure time within kOS. AUTO TIMELAPSE CALCULATION Enter your desired clip length and frame rate, then kOS will calculate the run time needed. BUMP BUTTONS Move in very small increments to ensure a precise camera position. DROPBOX INTEGRATION Upload saved moves directly to your Dropbox account within kOS app. MOTOR CONFIGURATION Each axis is able to be customized with individual features such as run speed, dampening, smoothness of curves, bump button, and axis naming.

About

MixEffect Pro

Control your ATEM video switchers with a comprehensive remote interface. Manage switcher settings, audio, macros, media, and transitions. Features include animated SuperSource transitions, Video Follows Audio, and customizable layouts.

Highlights
  • Multiple ATEM switcher control
  • Animated SuperSource transitions
  • Video Follows Audio
  • Customizable layouts
  • Macro management with icons
  • Audio input gain and fader control
  • External camera Multiview support
Features
Read full description

If you want to try out MixEffect Pro's features for 30-days, please visit the MixEffect app listing here on the App Store and activate the 30-day trial. MixEffect Pro shares the same database as MixEffect, so you have access to the same switchers, SuperSource presets, and streaming services. === MixEffect Pro’s familiar interface gives you quick access to virtually everything you need to run your video productions: switcher control, macros, audio, media, editing palettes, recording and streaming. MixEffect Pro then turns the dial past ten with animated SuperSource transitions, Video Follows Audio, customizable layouts, and Shortcuts support. Manage your live productions confidently with MixEffect Pro! # FEATURES MixEffect Pro is packed full of features to control your ATEM switchers. ## SWITCHER MANAGEMENT Control multiple ATEM switchers. Sync your switcher settings between all of your iCloud-connected devices. ## EXTERNAL CAMERA See and interact with the Multiview from your ATEM switcher directly in MixEffect. Change inputs, perform cut and auto transitions, set SuperSource presets, and more. Requires iPadOS 17 and an HDMI/SDI to USB adapter to connect your device with your ATEM switcher to view the Multiview. ## PANELS / BUTTONS Customize the look of your switcher interface with separate iPhone, Landscape, and iPad-optimized layouts. Choose from 20 panels to include in your layouts. ## SUPERSOURCE Become a SuperSource master on. Automatically animate transitions when switching between SuperSource layouts! Use drag and drop to rearrange your boxes. Save your favorite preset layouts and share them with others. Requires an ATEM switcher that supports SuperSource. ## AUDIO Control audio on ATEM switchers. Adjust each audio source’s input gain, fader gain, frames delay, and pan settings. ## MACROS Give your macros the gift of icons, colors, filtering, and sorting. Choose from three different display layouts: Grid, Buttons, and List. Access all of your macros from the virtual switcher interface. ## MEDIA Upload still images from your Photo Library into your switcher’s Media Pool. ## TRANSITIONS Access all the transitions supported by your switcher such as Mix, Dip, Wipe, and DVE, not just the ones wired to hardware buttons. ## DOWNSTREAM KEYERS Missing that DSK On Air button on your ATEM Mini? It's there in MixEffect Pro! ## UPSTREAM KEYERS Adjust your Luma, Chroma, Pattern, and DVE settings for your upstream keyers. Use touch to easily set the chroma sample and change the position of your DVE frame. ## AUTOMATIONS Control your ATEM switcher with your voice and Shortcuts. Automatically switch inputs, change SuperSource layouts, and run macros when your audio levels rise or fall below a certain threshold. Enjoy extensive keyboard shortcuts throughout the app. ## COLOR GENERATORS Change your color sources without having to dig through palettes. ## HYPERDECK Control HyperDecks from MixEffect Pro. ## AUX Set the sources for all of your auxiliary outputs. ## STREAMING Add streaming services, servers, and profiles without having to know XML. Set a default profile and server for each of your streaming services. Import and export the Streaming.xml files supported by the ATEM Mini Pro, Pro ISO, Mini Extreme, and Mini Extreme ISO line of switchers. ## RECORDING Control your disk recordings from your iPhone or iPad. Switch disks with a tap and see how much time is available for recording. ## SECURITY Prevent unwanted access to MixEffect Pro with Face ID (or device passcode lock). Activate View Only Mode so people can see what’s happening on the switcher without the ability to change anything. ## SWITCHER SETTINGS Set your switcher’s video mode, change the labels of sources, configure Multiview, and save your switcher's startup settings. ## SIMULATOR MixEffect Pro features a simulated ATEM 1 M/E Production 4K switcher for testing purposes.

Screenshots

MixEffect Pro4 screens

Verdict

The call

The clearest difference is review sentiment: MixEffect Pro at 64% against Kessler kOS's 0%. MixEffect Pro also leads on rating (4.3 vs 3.0) and update cadence (every 5 weeks vs every 3 months). Kessler kOS's advantage is price (Free vs $49.99) and in-app purchases (none vs 4). On ads 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

Kessler kOS is free to download; MixEffect Pro costs $49.99 up front. MixEffect Pro sells 4 one-off in-app purchases. Kessler kOS asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

MixEffect Pro holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: MixEffect Pro has 15 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of Kessler kOS's written reviews are positive against 64% of MixEffect Pro's.

UpkeepUpdate frequency

Kessler kOS ships an update every 3 months, MixEffect Pro every 5 weeks. The most recent releases landed on July 18, 2026 and September 24, 2026 respectively.

Scorecard9 real differences · 1 level
Kessler kOS versus MixEffect Pro: the parameters behind the verdict, then further details
ParameterKessler kOSMixEffect Pro
PriceFree — better$49.99
Rating3.0 (3 ratings)4.3 (15 ratings) — better
Positive reviews0.0% of reviews64.3% of reviews — better
Number of ratings315 — better
Update frequencyEvery 3 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterPaid
DevicesiPadiPhone, iPad, iPod, Mac — better
Requires iOS18.015.6 — better
Further details — not scored
Size38 MB113 MB
Age rating4+4+
DeveloperKessler Crane Inc.Adam Tow

Customer experience

Kessler kOS

All ratings3 ratings
Positive33.3%
Neutral0.0%
Negative66.7%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

MixEffect Pro

All ratings15 ratings
Positive73.3%
Neutral13.3%
Negative13.3%
Written reviews14 reviews
Positive64.3%
Neutral14.3%
Negative21.4%

In-app purchases

None

Kessler kOS

No in-app purchases

4 purchases

MixEffect Pro

One-time4
  • Small Tip$0.99
  • Medium Tip$2.99
  • Large Tip$4.99
Show 1 more
  • Mega Tip$9.99

Questions

Is Kessler kOS free?
Kessler kOS is free to download, with no in-app purchases.
Is MixEffect Pro free?
MixEffect Pro costs $49.99, and also offers in-app purchases.
Which has better reviews, Kessler kOS or MixEffect Pro?
MixEffect Pro is rated higher. Kessler kOS averages 3.0 out of 5 from 3 ratings, while MixEffect Pro averages 4.3 from 15 ratings.
Do Kessler kOS or MixEffect Pro have ads?
Neither Kessler kOS nor MixEffect Pro shows ads.
Which is updated more often, Kessler kOS or MixEffect Pro?
Kessler kOS ships an update every 3 months, and MixEffect Pro every 5 weeks. Most recently, Kessler kOS was updated on July 18, 2026 and MixEffect Pro on September 24, 2026.

Other comparisons