Caption Expert vs PostBuilder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Caption Expert
Effortlessly create engaging social media captions with AI. Simply select your photo, define your audience and desired tone, and let the intelligent generator craft the perfect text for your posts. Say goodbye to caption-writing struggles and hello to witty, funny, or heartfelt content.
- AI caption generation
- Photo analysis
- Audience targeting
- Tone selection
- Witty and heartfelt captions
Read full descriptionHide full description
Caption Expert is the #1 AI caption generator. Choose your photo, your target audience and tone, and our brilliant AI will generate the perfect caption for your photo. Gone are the days of struggling to find a caption for your post! It's never been easier to think of witty, funny, or heartfelt captions. Try it today and you'll never need to think of a caption again. - Payment will be charged to your iTunes account at confirmation of purchase on a once a month basis. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Your account will be charged for renewal within 24-hours prior to the end of the current period. Subscriptions may be managed by you and auto-renewal may be turned off by going to your Account Settings after purchase. Any unused portion of a free trial period will be forfeited when you purchase a subscription, where applicable. PRIVACY POLICY https://shakd.io/privacy TERMS OF USE https://shakd.io/terms
PostBuilder
Enhance your social media presence with custom fonts and a content planner. Preview your posts and stories before publishing, and schedule content in advance for consistent engagement across platforms. Save drafts and create perfect line breaks for captions and bios.
- Custom fonts for captions and bios
- Content calendar for scheduling
- Post and story preview
- Perfect line break creation
- Unlimited draft saving
- Character counting
Read full descriptionHide full description
PostBuilder helps you save time and makes it easy for you to post on Instagram consistently. Use custom fonts that work on Instagram, TikTok, Facebook, Twitter, and more. Schedule unlimited future Instagram stories and posts in your PostBuilder content calendar. Stand out from the crowd on Instagram with over 60 custom fonts that you can use in your captions and bio. Preview your posts directly inside PostBuilder before you post to your Instagram feed. ________________________________ ◆ How to create perfect line breaks using PostBuilder ◆ 1. Type your caption with the spaces you want in PostBuilder 2. Tap “Copy Caption” 3. Paste this into your bio or captions on Instagram, TikTok, Facebook, Twitter, or any other social media platform to automatically apply perfectly spaced out line breaks every single time 4. Preview what your captions and posts will look like before you post to Instagram with PostBuilder’s new Content Preview tool 5. Save unlimited drafts (for future posts, stories, hashtag groups, and more) ________________________________ Full List of PostBuilder Features: ● Preview posts and stories before you submit ● Unlimited scheduling for stories and posts ● Make perfect line breaks for your captions, comments, and bio ● NO MORE NOTES APP: Store an unlimited number of drafts ● Use over 60 custom fonts that work across Instagram, TikTok, iMessage, Twitter, LinkedIn, Facebook, and more ● NO INSTAGRAM LOGIN REQUIRED ● Desktop version ● Count characters while you type ________________________________ PostBuilder does NOT require you to connect your Instagram account. ________________________________ Operating since 2019 (Previously as GramSpacer) Featured #1 in the App Store for Paid Social Media ________________________________ PostBuilder is not officially associated with Instagram or Facebook. PostBuilder is an official entity under Andrew Lee Ventures LLC. Connect with us on Instagram and Twitter: @PostBuilderApp Have any questions or recommendations? Feel free to reach out to me at: Andrew@AndrewLee.Ventures Privacy Policy: postbuilderapp.com/privacy Terms of Use: postbuilderapp.com/terms-of-use
Screenshots
Verdict
The clearest difference is review sentiment: PostBuilder at 81% against Caption Expert's 36%. PostBuilder also leads on monetization model (free with in-app purchases vs subscription) and update cadence (every 4 days vs fortnightly). Caption Expert's advantage is rating (4.6 vs 4.3) and ratings volume (2.4K vs 472). On price, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Caption Expert sells 6 in-app purchases, starting at $4.99 per 7 days and PostBuilder sells 9 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Caption Expert holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Caption Expert has 2.4K ratings behind it against 472, so its average is the more settled of the two. Written reviews complicate that: 36% of Caption Expert's written reviews are positive against 81% of PostBuilder's, so the app with the better star average is not the one people write more warmly about.
Caption Expert ships an update fortnightly, PostBuilder every 4 days. The most recent releases landed on September 22, 2026 and October 7, 2026 respectively.
| Parameter | Caption Expert | PostBuilder |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (2.4K ratings) — better | 4.3 (472 ratings) |
| Positive reviews | 36.4% of reviews | 80.7% of reviews — better |
| Number of ratings | 2.4K — better | 472 |
| Update frequency | Fortnightly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | Free with in-app purchases — better |
| Devices | iPhone | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 16.0 | 13.1 — better |
| Further details — not scored | ||
| Size | 102 MB | 23 MB |
| Age rating | 12+ | 4+ |
| Developer | Shakd, LLC | Andrew Lee |
Customer experience
Caption Expert
PostBuilder
User reviews
Caption Expert
From 2.4K App Store ratingsWhat we love
- 👍 Easy to use
- 🚀 Helpful captions
- 💡 Unique caption ideas
- 🔥 Useful for growing Instagram following
Room to improve
- 💰 Expensive subscription
- 🔒 Difficult to cancel subscription
- 🐛 Captions not saving properly
- 👎 Repetitive and uninspired captions
PostBuilder
From 472 App Store ratingsWhat we love
- 👍 Easy to use
- 🚀 Efficient for creating Instagram posts
- 💡 Helpful for formatting captions
- 🔧 Useful features like saving drafts
Room to improve
- 🐛 Inconsistent performance
- 🔒 Aggressive upselling/paywall
- 🤔 Keyboard layout issues
- 🙄 Removing previously free features
Bugs and requests
Caption Expert
Reported bugs
3 issues- App crashes on launch
- Unable to access content without paid subscription
- Website link for support is broken
Requested features
3 requests- Add ability to save custom captions
- Improve customer support and cancellation process
- Expand caption categories beyond generic quotes
PostBuilder
Reported bugs
3 issues- Captions not formatting correctly
- App crashing or freezing
- Issues with linking accounts
Requested features
3 requests- Add auto-correct or predictive text
- Allow using device's native keyboard
- Improve overall stability and reliability
In-app purchases
Caption Expert
- Caption Expert$4.997 Days
- Caption Expert$9.997 Days
- Caption Expert3 Days trial$9.997 Days
Show 3 moreShow fewer
- Caption Expert Pro7 Days trial$29.991 Year
- Caption Expert Pro3 Days trial$29.991 Year
- Caption Expert3 Days trial$69.991 Year
PostBuilder
- PostBuilder Pro - 1 Week3 Days trial$2.997 Days
- GramSpacer Free Trial14 Days trial$4.991 Month
- IG Caption Writer App Trial14 Days trial$4.991 Month
Show 3 moreShow fewer
- PostBuilder Pro (1 Month)3 Days trial$7.991 Month
- PostBuilder Pro (6 Months)3 Days trial$14.996 Months
- PostBuilder Pro (Yearly)3 Days trial$34.991 Year
- PostBuilder Free TrialFree
- IG Caption Writer Free TrialFree
- Repost for IG Free TrialFree
Questions
Is Caption Expert free?
Is PostBuilder free?
Which has better reviews, Caption Expert or PostBuilder?
Do Caption Expert or PostBuilder have ads?
Which is updated more often, Caption Expert or PostBuilder?
Other comparisons















