Comparison · fact-checked 2026-09-29
Inbill vs Invoice Simple
Choose Invoice Simple if you live in its mobile app and want estimates with client signatures. Choose Inbill if you want a genuinely free plan — Inbill includes 10 invoices a month at $0, while Invoice Simple's cheapest plan is $6.99/month for 3 invoices.
Pick Inbill if
- You want a real free plan, not a 14-day trial.
- You send a handful of invoices a month — 10 are free, every month.
- You want AI to draft invoices from a spoken or typed sentence.
- You invoice internationally and need multi-currency PDFs.
Pick Invoice Simple if
- Estimates with client signatures are central to your workflow.
- You want its established iOS/Android estimate-to-invoice app.
- Read receipts on sent invoices matter to you.
- You prefer a long-standing brand with a large review base.
Feature-by-feature
| Decision point | Inbill | Invoice Simple |
|---|---|---|
| Permanently free plan | Yes — 10 invoices/month | No — 14-day trial only |
| Entry paid plan | $5/month, unlimited invoices | $6.99/month, up to 3 invoices/month |
| Unlimited invoices | Pro, $5/month | Premium, $21.99/month (Plus is $14.99 for 10/month) |
| AI invoice drafting (voice + text) | Included | Not offered |
| Multi-currency invoicing | 47 currencies | Currency selectable per invoice |
| Estimates | Free; client accepts or declines on the link, one-tap convert to invoice (no e-signature) | Included; client signatures on Plus and Premium |
| Hosted invoice link | Included free | Online invoice sharing included |
| Recurring invoices | Free (counts toward 10/mo) | Higher plans |
Honest verdict
Invoice Simple is a polished, mobile-first estimates-and-invoices app with a decade of reviews behind it. If estimates, signatures, and read receipts drive your work, it earns its subscription.
Inbill wins on price structure: its free plan (10/month, forever) covers more volume than Invoice Simple's $6.99 Essentials plan (3/month), and unlimited invoicing costs $5 against $21.99. Add voice-AI drafting in four languages and the choice mostly follows your budget and whether you need signed estimates.
Sources checked
Competitor facts come from their own current product or help pages.