I believe their booking fee also applies on the day if using the website, and is only waived when booking on the day using their app. Happy to be corrected.
That's correct; it has to be on the day
and on the app.
Though Trainsplit do charge a commission on split ticket savings, so sometimes Trainsplit is cheaper, sometimes Trainline is cheaper.
Yes it's true that sometimes Trainline can offer bigger split discounts than the booking fee.
However, most journeys don't involve splitting, and so anyone who pays the fee may end up paying more than if they had booked through a site that doesn't charge booking fees, so it could cost more to use the Trainline app than (say) the Northern app, which has been cited as an alternative , even though the latter doesn't charge fees.
Using the forum site (or Trainsplit app - there isn't a forum version) means you won't be paying any more than you would pay by booking through Northern.
It's just not called a booking fee.
A booking fee is exactly that - a few for booking.
A share of savings fee is very different, as if there is no saving then there is no fee. In other words, it won't be cheaper to use the Northern app over Trainsplit, but it absolutely can be cheaper to use Northern over Trainline.
Trainpal don't charge commission on ticket splits if booked on their app, plus don't charge any booking fee.
A booking fee is charged if you buy before the day of travel.
A plus point of TrainSplit is that they have a seat picker for TOCs which don't have them on their own websites/apps, GWR, Cross Country.
Yes, plus no booking fee, so it won't be cheaper to book through those TOCs directly.
It is surprising how many people put up with sub standard websites or apps from TOCs, when third party sites / apps - such as the forums site / Trainsplit app - offer a better experience and for either the same price, or cheaper.
Unlike ScotRail, the forum absolutely does value the custom of people who use the forum site and will listen to - and welcomes - constructive feedback etc, and won't fob people off with a poor product for money saving reasons