# What is ERC721-C ?

Source: https://erc721c.com

## Summary

Apptokens are tokens whose every buy, sell, or claim requires the developer's app, with rules enforced on-chain at the contract level. The page describes several types: Trade Apptokens can set price ranges, fixed ratios, tiered fees, and gated access, while Temporal Apptokens unlock on a schedule, expire after a season, or exist only during a live event. Spend-Only Apptokens can be used within an app but not traded on a DEX, and Compliant Apptokens can gate ownership by identity verification. The page also claims Backed Apptokens are redeemable from a backing pool, giving holders a guaranteed floor price. It does not mention ERC721-C.

## Article

Every transaction goes through your app

Client-Side Apptokens

Every token buy, sell, or claim requires your app. Turn speculation into daily active users.

Your economy, your rules

Trade Apptokens

Control who trades, at what price, and on what terms. Set price ranges, fixed ratios, tiered fees, and gated access — all enforced on-chain.

Tokens with a clock

Temporal Apptokens

Tokens that unlock on a schedule, expire after a season, or only exist during a live event — all enforced at the contract level.

Spend it, don't trade it

Spend-Only Apptokens

Promotional rewards, resource tokens, and utility tokens that can be spent within your app but never traded on a DEX.

KYC at the contract level

Compliant Apptokens

Gate ownership by identity verification, enforce jurisdiction-specific rules, and tokenize real-world assets — all without off-chain middleware.

Price floor, built in

Backed Apptokens

Every token is redeemable from a backing pool, giving holders a guaranteed floor price. Monetize spends while keeping prices stable.