Track Gear Calculator vs ZCRE
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Track Gear Calculator
This app helps track cyclists calculate gear ratios and speeds. It supports a wide range of chainring and cog sizes, and can determine optimal gear changes. Results can be displayed in Imperial or Metric units.
- Chainring and cog size support
- Speed and cadence calculation
- Calculate next gear up or down
- Reverse gear calculation
- Standard or actual wheel diameter options
- Imperial or Metric unit display
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Tired of carrying a gear chart to the velodrome every day, or searching the web for one every time you change gears? Then you need a gear calculator on your iPhone and your Apple Watch. Built by track racers for track racers, the Track Gear Calculator supports chainrings from 44 to 70 teeth and cogs from 8 to 20 teeth. It includes a speed/cadence calculator, and can calculate the next gear up or down using only the gears in your track bag. Want a bigger gear or a smaller gear? Track Gear Calculator works in reverse, too: just swipe the gear inches, and you'll get a new gear, up or down from where you are, using only the chainrings and cogs you have with you. You can also select from the standard 27" nominal method for calculating gears, or more accurate actual wheel diameters, and you can see results in either Imperial gear inches or Metric development.
ZCRE
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App to control the exits of the Zwift time trial. Very useful for WTRL races where the starts are delayed and it is important not to pedal, warm up ...
Screenshots
Verdict
The clearest difference is price: ZCRE at Free against Track Gear Calculator's $0.99. ZCRE also leads on update cadence (daily vs every 5 months) and iOS requirement (11.0 vs 13.4). On 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
ZCRE is free to download; Track Gear Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Track Gear Calculator ships an update every 5 months, ZCRE daily. The most recent releases landed on September 14, 2026 and May 16, 2026 respectively.
| Parameter | Track Gear Calculator | ZCRE |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.2 (12 ratings) — better | — |
| Positive reviews | 68.8% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 5 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.4 | 11.0 — better |
| Further details — not scored | ||
| Size | 12 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Matt Herz | Antonio Fernandez Herruzo |
In-app purchases
Track Gear Calculator
No in-app purchases
ZCRE
No in-app purchases
Questions
Is Track Gear Calculator free?
Is ZCRE free?
Do Track Gear Calculator or ZCRE have ads?
Which is updated more often, Track Gear Calculator or ZCRE?
Other comparisons
