Big Ben vs Inertia Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Big Ben
Experience the iconic Big Ben on your iPhone or iPod Touch. Customize your display with digital clock options, a seconds hand, and authentic tick-tock sounds. Enjoy hourly chimes and quarter-hour alerts, even when the app is closed, for a decorative and timely experience.
- Digital clock display
- Seconds hand option
- Tick-tock sound
- Quarter-hour chimes
- Hourly tolling
- Background notifications
Read full descriptionHide full description
During 2009, the UK Parliament celebrated the 150th anniversary of its world famous Clock Tower, Great Clock and Great Bell. The name Big Ben is often used to describe the tower, the clock and the bell but the name was first given to the Great Bell. 1859 was the beginning for all three elements when the Clock Tower was completed, the Great Clock started on 31 May and the Great Bell’s chimes were heard for the first time on 11 July. Have your iPhone, iPad and Apple TV display the time of day in style. Options include: adding a digital clock display showing a seconds hand having it make a tick-tock sound having it chime every quarter of an hour and toll on the hour (the chiming and tolling sounds will play even when the app is not open, so long as your device is not muted and you allow notifications in the General Settings for Big Ben) having it chime only on the hour instead of every quarter of an hour having a "Quiet Hours" period during which no chimes will play Pointless? Maybe. Decorative? Certainly. NB If you wear an Apple Watch, make sure you turn off Mirror iPhone Alerts From: BigBen or you will not hear the chimes. Thanks to all who left comments and suggestions for improvement.
Inertia Pro
This app allows users to force any content on any website, including social media posts, products, and text. It's integrated into a web browser for seamless use during performances. Additional paid features enable editing text and using the app on borrowed phones.
- Force any Instagram photo or video
- Force specific items on eBay or Amazon
- Force Netflix movies or news headlines
- Edit text on any website
- Use on borrowed phones with Momentum add-on
- Remote performance capabilities via Xeno Sites
Read full descriptionHide full description
Inertia Pro is a completely new forcing app that relies on a diabolical new principle. Inertia Pro lets you force *anything* on *any website*... whilst the spectator is looking at the phone. It’s built in to a web browser, allowing you to use it to force pretty much anything, such as: • An Instagram photo or video on ANY profile. • A specific item for sale on eBay. • Any Netflix movie. • A product from Amazon. • A line of text or single word on a news website. • Any photo from Google Images. • ...and so much more! (Note: The page used is completely genuine - this will work on ANY website the spectator chooses, and in ANY language!) “Marc is without doubt the single greatest mentalism app creator I know. From design to execution, his apps are absolutely flawless. Inertia Pro is a prime example of why I trust in his work so implicitly, it is jaw droppingly good and represents one of the most cutting-edge mentalism releases to date!” - Michael Murray Plus, with Inertia Pro's new Edit Mode (paid feature), you can now edit the text on any site to ensure your force is included. ALSO - Inertia Pro: Momentum (paid feature) now also lets you use Inertia Pro on a borrowed phone. With multiple pairing methods available and a redirect process, Momentum is an extra purchase within Inertia Pro that will let you perform the same effect using a borrowed phone. Furthermore: WikiTest Pro Tools users can even use further integrations between Inertia Pro: Momentum. If you have Xeno, you can use your own Xeno Sites with Inertia Pro, or use any of the public Xeno Sites available in the gallery. And... you can perform Inertia Pro with any Xeno Site remotely! This can all happen on the spectator's device, without you touching it. Perfect for Zoom shows or long-distance performances! The Jerx wrote this about Inertia Pro: “You know those phone forces where you would hold the phone upside down and have them scroll blindly and whatever picture or item they landed on would be forced (usually because their scrolling wasn’t doing anything)? Well, this app allows you to do that type of force face-up while the spectator looks at the phone. It’s so good and *feels* exactly like it should.” - Andy @ The Jerx --- Inertia Pro is for entertainment purposes only, designed for professional performers. This app does not provide true mind reading abilities or anything similar. Please get in touch to discuss TV or video performance rights.
Screenshots
Verdict
The clearest difference is price: Big Ben at $2.99 against Inertia Pro's $69.99. Big Ben also leads on in-app purchases (none vs 2) and device support (4 vs 2). Inertia Pro's advantage is review sentiment (100% vs 57%) and rating (4.9 vs 3.8). On ratings volume, 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
Big Ben costs $2.99 and Inertia Pro $69.99 up front. Inertia Pro sells 2 one-off in-app purchases. Big Ben asks for nothing beyond the download.
Inertia Pro holds the better App Store score, 4.9 against 3.8. Both are backed by a comparable volume of ratings — 41 and 31 respectively. Written reviews point the same way: 57% of Big Ben's written reviews are positive against 100% of Inertia Pro's.
Big Ben ships an update every 41 months, Inertia Pro weekly. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.
| Parameter | Big Ben | Inertia Pro |
|---|---|---|
| Price | $2.99 — better | $69.99 |
| Rating | 3.8 (41 ratings) | 4.9 (31 ratings) — better |
| Positive reviews | 57.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 41 — better | 31 |
| Update frequency | Every 41 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod, Apple TV — better | iPhone, Apple Watch |
| Requires iOS | 15.6 — better | 16.6 |
| Further details — not scored | ||
| Size | 130 MB | 14 MB |
| Age rating | 4+ | 17+ |
| Developer | Ettore Software Ltd. | Marc Kerstein |
Customer experience
Big Ben
Inertia Pro
Bugs and requests
Big Ben
Reported bugs
11 issues- App crashes immediately upon opening
- Not compatible with iOS 15, iOS 17, iOS 12
- Doesn't chime when phone is locked or in background
- No sound output despite notifications enabled
- App won't launch on iPhone 15.3.1
Show 6 moreShow fewer
- Crashes on iPhone 12 mini
- VoiceOver notifications interfering with chimes
- Hourly chime not functioning on iOS 11.2.6
- Chimes stop working after app update
- Tick-tock sounds out of sync with second hand
- Paid version requires repurchase and doesn't work
Requested features
20 requests- Night mode/silent hours scheduling (9pm-5am)
- Adjustable volume control within app
- Smooth minute hand animation
- Hourly-only chime option (disable quarter chimes)
- Background chimes while phone is locked
Show 15 moreShow fewer
- Chimes on half-hour intervals
- Dynamic backgrounds based on time of day/weather
- Updated Big Ben chimes post-renovation
- Customizable lock screen display
- iPad/universal app version
- Weather integration
- Multiple background images/locations
- Chimes on watch/wearables
- Alarm functionality
- Tick-tock sounds in sync with second hand
- Floodlit Big Ben for nighttime display
- GPS-based daylight/sunset lighting
- Screen saver functionality
- Quieter/softer tick-tock option
- Delay between quarter and hour chimes
Inertia Pro
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Big Ben
No in-app purchases
Inertia Pro
- Edit Mode$12.99
- Momentum$59.99









