The four kinds of limit
Invoice caps: QuickBooks’ free tier allows 2 invoices a month.
Turnover and volume caps: Zoho Books Free allows 1,000 invoices and 1,000 expenses a year, and only while turnover stays under $50K.
Missing bank feed: Wave’s free Starter plan has unlimited invoices but no bank feed.
No free plan at all: Xero has no free tier; every Xero plan is paid after the trial. FreshBooks has no permanent $0 plan; it offers a 30-day free trial, then a paid plan.