Exposure SYNC vs 446 Chall
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Exposure SYNC
Control your bike lights with custom burn times and lumen outputs. This app allows simultaneous command of helmet and handlebar lights for ultimate smart control via Bluetooth.
- Bluetooth connectivity
- Customizable programs
- Adjustable burn time
- Adjustable lumen output
- Simultaneous light control
- Remote setup
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SYNC is Exposure Lights latest technology, using a Bluetooth connection combined with the APP you can create bespoke burn times and Lumen outputs. It allows the rider to have simultaneous command of both a helmet and handlebar light to give the ultimate smart control. 1. Bluetooth connectivity App links to SYNC range of lights via Bluetooth, user can customise user programs, switch standard programs, check live battery status, and setup the SYNC handlebar remote on a maximum of two lights 2. Customisable programs You can tune burn time or lumen output to your chosen levels based on your ride requirements. Additionally, you can turn modes on/off and turn flash on/off on these programs. 3. Bluetooth remote Setup your Bluetooth remote to control one or two lights, with the ability to synchronise the mode changes or run both lights separately.
446 Chall
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Join Alex as he takes on 446 mountains across England & Wales, running to raise awareness and support for Mind Over Mountains, a mental health charity that believes in the healing power of nature. + Follow the journey + Join a run near you + Discover your local peaks Be part of the challenge. Find your mountain.
Screenshots
Verdict
Exposure SYNC and 446 Chall are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 8, 2026 and September 10, 2026 respectively.
| Parameter | Exposure SYNC | 446 Chall |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 6.7% of reviews | — |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.4 — better | 12.4 |
| Further details — not scored | ||
| Size | 18 MB | 53 MB |
| Age rating | 4+ | 17+ |
| Developer | Ultimate Sports Engineering | Boom Software |
In-app purchases
Exposure SYNC
No in-app purchases
446 Chall
No in-app purchases
Questions
Is Exposure SYNC free?
Is 446 Chall free?
Do Exposure SYNC or 446 Chall have ads?
Which is updated more often, Exposure SYNC or 446 Chall?
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