Zup support

Need help with captions, photo selection, sharing, or your privacy controls? Email [email protected].

What to include

Tell us what you were trying to do, what happened instead, your iPhone model, iOS version, and Zup app version. Do not email private photos, captions, passwords, API keys, or social account tokens.

Caption help

Generate defaults to Google Gemini 3.8 Flash through OpenRouter and requires an internet connection. Fireworks AI’s GLM 5.3 Flash is the first live fallback, followed by TokenRouter and Mistral. Before the first hosted caption, Zup asks once for permission covering OpenRouter, TokenRouter and their model providers, Fireworks AI, Mistral AI, and the caption models offered through them. After approval, Zup can use the live fallback order without asking again. Nothing uploads before approval. Apple’s on-device captioning remains part of the separately configured Daily suggestion flow on supported iPhones. You can revoke future hosted-caption requests under Your Voice → AI caption sharing.

Sharing help

X, Instagram professional accounts, Facebook Pages, LinkedIn, and TikTok use a connected account and show a final review in Zup before direct publishing. On Instagram, Feed publishes all selected photos with the reviewed caption. Instagram’s publishing API does not accept Story captions, so a captioned Story opens Instagram’s native editor with the photo ready and the reviewed caption copied for Paste; a photo-only Story can publish directly. During Facebook connection, you can choose all eligible Pages you manage or select specific Pages; every confirmed post goes only to that saved selection. Facebook cannot publish directly to personal profiles, so Zup clearly separates direct Page publishing from Open Facebook; the personal-profile choice opens Facebook’s native composer for the user’s confirmation. TikTok also offers Send as TikTok draft, which delivers the content to your TikTok inbox for you to finish, and Open TikTok instead as a Share Kit fallback. WhatsApp remains a native share handoff because its business API cannot publish personal Status updates or act as a user’s chat account. If a network asks you to connect again, reconnect under Your Voice → Connected posting so Zup can refresh the permissions required to publish. Apple’s share sheet remains available as the generic fallback for other compatible apps.

If a direct post fails, confirm that the account is connected, the caption and photo count fit the destination’s limits, and the network has not revoked Zup’s publishing access. Zup does not need your password; never send support a password or social token.

Posting limits in Zup

Zup’s editor fits X drafts to 280 weighted characters; Instagram, TikTok, and LinkedIn drafts to 2,200 characters; and Facebook drafts to 5,000 characters. These are the app’s draft limits, not a statement of each network’s maximum. On X, a link counts as 23 characters, and some emoji and non-Latin characters count as 2.

Scheduled X posts accept up to 4 photos, and scheduled LinkedIn posts accept up to 20 photos. Direct Instagram feed and Facebook Page publishing accept up to 10 photos. An Instagram Story uses exactly 1 photo. Direct photo uploads must be JPEG, PNG, or WebP; keep each photo under 5 MB. These requirements were checked on October 30, 2026.

Choose a scheduled time from 10 minutes to 30 days ahead, within your account connection’s validity. Each installation has 20 slots for pending scheduled posts across X and LinkedIn. Cancel a pending post to make room; a post that has started publishing cannot be cancelled.

Privacy and deletion

Read the privacy policy, review the terms of service, or follow the data-deletion instructions. Privacy requests can be sent to [email protected].