Comparison

Grid Post Pic Collage Maker vs GemSim

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Grid Post Pic Collage Maker

Create unique social media profiles by dividing photos and videos into multiple posts. This app helps you design eye-catching banner-style images for your profile page, making your content stand out.

Highlights
  • Create 50+ grid types
  • Suggests images for posting
  • Easy photo cropping
  • Add videos to grids
  • Profile banner creation
Features
Read full description

Everyone post their photos on social network and we just follow them but i think we should now post photos in unique style - use grid post and make partition of photo and then this app will post that parts one by one easily, now it will show a full banner of that pic in your social network profile. Features : - 1. You can make 50+ type of grids 2.App will suggest you which image to post one by one 3.Easy to crop the pic within the app 4.Add videos to the grids. Grid post introduces a totally new way of using your social network, wrapped in simple and easy to use design. Don't miss the chance to express yourself by adorning your profile page and posting breathtaking large scale images. Download Today and have some fun! Membership subscription - Payment will be charged to iTunes Account at confirmation of purchase - You will be able to color all available images for the duration of the subscription - Subscription automatically renews for the same price and duration period as the original "one week"/"one month"/"one year" package unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period at the cost of the chosen package (weekly, monthly or yearly package) - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's iTunes Account Settings after purchase - No cancellation of the current subscription is allowed during active subscription period - You may cancel a subscription during its free trial period via the subscription setting through your iTunes account. This must be done 24 hours before the end of the subscription period to avoid being charged. Please visit http://support.apple.com/kb/ht4098 for more information - You may turn off the auto-renewal of your subscription via your iTunes Account Settings. However, you are not able to cancel the current subscription during its active period - Any unused portion of a free-trial period, will be forfeited when the user purchases a subscription Links to our Terms of Service and Privacy Policy can be found below Privacy Policy:https://www.freeprivacypolicy.com/live/468be400-20f9-4aad-97e0-a2bfe6687be9 Terms of Use:https://www.freeprivacypolicy.com/live/e5953d91-9843-49fb-bb50-32b60cfa1468

About

GemSim

Features
Read full description

Design your gemstone before you cut it. GemSim is a free 3D gemstone faceting simulator for designing, visualizing, and refining gemstone cuts before touching a real stone. Whether you’re learning faceting, experimenting with new ideas, or recreating published designs, GemSim gives you powerful design tools on iPhone, iPad, and the web. Interactive 3D Simulation • Rotate, zoom, and inspect your gemstone from any angle • See design changes instantly in 3D • Preview gemstones with realistic rendering • Analyze light return, windowing, and head shadow Faceting Design Editor Create and modify designs with detailed faceting controls. • Add, edit, reorder, duplicate, and delete tiers • Control facet angles, depths, and indices • Create and reuse custom index sequences • Select meet points directly from the 3D model • Use fractional indexes for advanced designs • Toggle tier visibility and undo changes Frost Edge Create decorative frosted edges directly from the 3D model. • Select individual edges or groups of symmetrical edges • Control the width of the frost strip • Frost crown, pavilion, and girdle edges • Automatically generate editable frost tiers • Preview frosted facets with realistic rendering • Include frosted facets in printable cutting diagrams Design Library Explore thousands of classic and public gemstone designs. Search by shape, design name, designer, dimensions, and more. Load a design and immediately start exploring or editing it. Cloud Storage & Sharing Create a free GemSim account to save designs in the cloud and access them across devices. • Store up to 100 cloud designs • Share designs using public links • Share privately with specific GemSim users • Choose View Only or View + Copy access • Manage access independently for each design An account is optional. Core design and simulation features remain available without signing in, and you can continue saving and opening files locally. Import, Export & Print • Save editable GemSim project files • Export designs as 3D models • Generate printable cutting diagrams and instructions • Use local files without an account Learn and Experiment GemSim is built for beginning cutters, experienced faceters, hobbyists, students, and gemstone designers. Experiment with angles, indices, proportions, meet points, frost patterns, and complete designs without risking valuable rough material. Make mistakes on the screen instead of on the dop. GemSim is free to use, with no subscription required to create, edit, and simulate gemstone designs. Start designing today and discover what’s possible before you make the first cut.

Screenshots

Grid Post Pic Collage Maker4 screens
GemSim4 screens

Verdict

The call

The clearest difference is in-app purchases: GemSim at none against Grid Post Pic Collage Maker's 4. GemSim also leads on update cadence (every 2 weeks vs every 4 months). Grid Post Pic Collage Maker's advantage is iOS requirement (12.1 vs 15.0). On price, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Grid Post Pic Collage Maker sells 4 in-app purchases, starting at $1.99 per 7 days. GemSim asks for nothing beyond the download.

UpkeepUpdate frequency

Grid Post Pic Collage Maker ships an update every 4 months, GemSim every 2 weeks. The most recent releases landed on October 20, 2026 and October 9, 2026 respectively.

Scorecard3 real differences · 7 level
Grid Post Pic Collage Maker versus GemSim: the parameters behind the verdict, then further details
ParameterGrid Post Pic Collage MakerGemSim
PriceFreeFree
Rating4.5 (7K ratings) — better—
Positive reviews61.5% of reviews—
Number of ratings7K — better—
Update frequencyEvery 4 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.1 — better15.0
Further details — not scored
Size72 MB68 MB
Age rating4+4+
DeveloperShenzhen Qianhai Happy Tour Network Technology Co., Ltd.Xuezhong Wang

Bugs and requests

Grid Post Pic Collage Maker

Reported bugs

4 issues
  • Splitting photos into grids doesn't work as expected
  • App crashes when trying to save/export grid
  • Grid layout gets reduced to fewer squares than selected
  • App freezes or gets stuck on loading screens

Requested features

4 requests
  • Add more grid layout options
  • Improve video compression quality
  • Allow adding images from favorites/albums
  • Add option to edit grid layout

GemSim

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

Grid Post Pic Collage Maker

Subscriptions3
  • 九宫格周会员3 Days trial$1.997 Days
  • Half Year Membership3 Days trial$2.996 Months
  • Yearly Membership7 Days trial$5.991 Year
One-time1
  • Upgrade To Pro Version$19.99
None

GemSim

No in-app purchases

Questions

Is Grid Post Pic Collage Maker free?
Grid Post Pic Collage Maker is free to download, with in-app purchases available.
Is GemSim free?
GemSim is free to download, with no in-app purchases.
Do Grid Post Pic Collage Maker or GemSim have ads?
Neither Grid Post Pic Collage Maker nor GemSim shows ads.
Which is updated more often, Grid Post Pic Collage Maker or GemSim?
Grid Post Pic Collage Maker ships an update every 4 months, and GemSim every 2 weeks. Most recently, Grid Post Pic Collage Maker was updated on October 20, 2026 and GemSim on October 9, 2026.

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