The short answer
GTOBase is Simple Poker’s web application: a solution viewer, a trainer and a hand-history analyzer that scores your played hands against a solved strategy. It’s sold one library at a time. The Spin & Go library runs $150 a month, $400 for three months or $1,200 a year. The HU Ante library is $75 a month. Those numbers are why people go looking for a GTOBase alternative.
For preflop study specifically, four tools cover the same ground for less. GTO Preflop ($119.99/yr) ships the solved preflop tree for cash, tournaments and Spin & Go on a phone, with a trainer that grades every decision in EV loss. Preflop+ ($129.99 once) is the cheapest way to own charts outright. GTO Wizard Starter ($468/yr) is the closest like-for-like swap if you want postflop in a browser too. And Simple Preflop Hold’em ($250/yr) keeps you inside the same family if you’d rather solve trees yourself, on Windows.
Note:
Full disclosure: GTO Preflop is our app. Every price, rating and version date below was read off the vendor’s own page or store listing on August 23, 2026. GTO Wizard is the one exception, and it’s flagged where it appears. Where a rival does something we don’t, it says so.
GTOBase alternatives at a glance
| Platforms | Price (Aug 2026) | What you actually get | |
|---|---|---|---|
| GTOBase | Browser, iPhone (v2.09, July 2023) | Spin & Go $150/mo, $400/3mo or $1,200/yr; HU Ante $75/mo; HU Cash free | Preflop and postflop solutions, a trainer and a hand-history analyzer, bought one library at a time |
| GTO Preflop | iPhone, iPad, Android, Apple Silicon Mac | Free download; Pro $19.99/mo or $119.99/yr | The whole solved preflop tree for cash, MTT and Spin & Go, plus a trainer that reports EV loss per 100 hands |
| Preflop+ | iPhone, iPad, Android | $9.99/mo, $79.99/yr or $129.99 lifetime | Nash and GTO charts with equity and pot-odds drills bolted on |
| GTO Wizard | Browser | Starter $468/yr ($39/mo billed annually) | A large presolved library across preflop and postflop, with drilling and reports |
| Simple Preflop Hold’em | Windows 64-bit only | $250/yr, single PC | Solve your own preflop trees for 2 to 10 players in ChipEV or ICM |
What GTOBase costs, library by library
The pricing model is the thing to understand before anything else. GTOBase doesn’t sell a plan that covers the app. It sells access to individual solution libraries, and there are five: Spin & Go, HU Ante, MTT, HU Cash and 6-Max Cash.
On the page you can read without an account, only two of those five carry a price. Spin & Go is $150 a month, $400 for three months, or $1,200 a year billed as $100 a month. HU Ante is $75 a month, and no longer term is offered for it. HU Cash 50–100bb is given away free. The MTT and 6-Max Cash tabs have no price attached at all, and app.gtobase.com renders nothing to a logged-out visitor, so there’s no second page to check.
Play Spin & Go and heads-up hyper turbos and you’re looking at $2,100 for a year of both. That is more than the other four tools on this page cost together, and it buys solutions rather than a trainer that follows you around.
Our own ad data shows people making exactly this comparison. We run Apple Search Ads for GTO Preflop, and in the 30 days to August 11, 2026 the search term “gtobase” produced 12 taps and 5 attributed installs of our app. Small numbers, and they’re floors rather than totals, since a large share of App Store ad traffic carries no keyword attribution. The shape matches what we saw with Equilab: people search the name of the tool they’ve heard of, then install something that fits in a pocket.
If you want to see what that looks like, GTO Preflop is free to download and you can get the app before reading the rest of this.
The mobile app hasn’t shipped since 2023
GTOBase markets itself as “one account, two apps” and puts an App Store badge and a Google Play badge side by side on its homepage. Both deserve a look before you subscribe.
The iPhone app, GTOBase - GTO Poker Train&View, is at version 2.09, last updated on July 2, 2023, with release notes reading “Small fixes.” It holds 3.9 stars from 19 ratings and sits in the App Store’s Entertainment category. Its own description still promises a “GTO Training Tool (will be added soon)” — a sentence that has now been sitting in a live listing for over three years. GTOBase’s FAQ is upfront that the mobile app is built separately from the web version and “some of the functionality may differ.”
The Google Play badge points at com.gtobasemobile. That URL returns a 404, and a Play search for GTOBase turns up nothing belonging to Simple Poker. So the Android app in the badge doesn’t exist, at least not on August 23, 2026.
None of this makes the web solves wrong. Simple Postflop and Simple Preflop Hold’em are serious engines with a long history, and the browser product is where the company puts its work. But if part of what you’re buying is study away from your desk, that half of the promise isn’t being kept.
The stack depths GTOBase never solved
Here’s the part that matters most for tournament players, and it’s not a price argument.
GTOBase’s MTT library is published as two blocks: 8-max at 40 to 100 big blinds, and 9-max at 15 to 30. Nothing below 15 big blinds exists in it. The 8-max solutions stop at 40, so there’s a hole between 30 and 40 as well. Short stacks are covered elsewhere in the app, in the Spin & Go library at 5 to 30bb and the HU Ante library at 5 to 40bb, but those are three-handed and heads-up trees. They don’t tell you how to open 6 big blinds from the hijack at a full table.
That is the depth range where tournaments are decided. In GTO Preflop’s MTT ChipEV solutions, computed with a standard 12.5% ante, every solved opening raise from 3 to 8 big blinds is all-in. At 10 and 12bb the only opening size in the tree is a 2bb min-raise. From 15bb up it’s 2.1 to 2.3bb. Three different games, and GTOBase’s full-ring library starts after two of them are over.
One small note on the numbers: GTOBase’s spot list and its FAQ don’t agree with each other. The Spin & Go tab says 5–30bb while the FAQ says 4–25bb, and the HU Ante tab says 5–40bb against the FAQ’s 4.5–40.5bb. We charted the spot list, since that’s the more specific of the two.
1. GTO Preflop — the whole preflop tree, on a phone
GTO Preflop is a mobile preflop solver library and trainer for iPhone, iPad, Android and Apple Silicon Macs. The solutions are computed in advance and ship inside the app: 11,385 decision points and 1,924,065 hand-specific strategies across 503 scenario files, spanning cash games, MTT ChipEV and Spin & Go from heads-up to 8-handed.
For someone leaving GTOBase, three things change. Coverage runs continuously from 3 to 100 big blinds in MTT across 14 solved depths, so the short-stack gap closes. Spin & Go gets 13 even-stack depths from 2 to 34bb plus 418 asymmetrical stack combinations down to 1.5bb, which is what real spin tournaments actually look like once someone doubles. And the trainer deals you spots, grades each decision against the solution, and reports EV loss per 100 hands with an ELO rating attached, rather than leaving you to browse.
That last part is worth weighing against the price gap. Solvers estimate that 70 to 80% of Spin & Go winnings come from preflop play, which is the library GTOBase charges $1,200 a year for.
Honest limits. It’s preflop only, by design, so there’s no postflop viewer and no hand-history analyzer. The MTT solves run 2, 4, 6 and 8-handed, so if you specifically want 9-max, GTOBase has a library and we don’t. Depths are a fixed grid, so 7.3 big blinds means using the 8bb solve. ICM is a single scenario. The trainer covers MTT 3–12bb and cash 50–200bb, not everything the viewer shows. And we don’t claim offline use.
Free to download. Pro is $19.99 a month or $119.99 a year on the standard plan, with a $7.99 weekly option; we run pricing experiments, so some users see different numbers. It holds 4.8 stars across 240 US App Store ratings, and 4.6 across 3.19K Google Play reviews on 100K+ downloads, with no ads. Current iOS version 3.0.30, updated May 26, 2026.
2. Preflop+ — one payment, charts and drills
Preflop+ from Crafty Wheel Studios is the value play. It’s $129.99 once for the lifetime licence, or $9.99 a month and $79.99 a year if you’d rather rent. For that you get Nash and GTO preflop charts with equity and pot-odds tooling around them.
It’s a real product with a real following: 4.6 stars from 1,018 US App Store ratings on version 25.9, updated August 10, 2026, and 4.1 stars from 2.57K reviews on Google Play. What it doesn’t do is give you the full solved tree with EV attached to every branch, or a training loop that scores you. It shows charts and it shows them well. We broke down how it compares against the rest of the category in best preflop chart apps.
Buy it if the thing you miss from GTOBase is a reference you own outright, with no renewal date.
3. GTO Wizard — the closest like-for-like swap
If what you want is a browser with preflop and postflop solutions and drilling on top, GTO Wizard is the direct substitute, and the Starter tier at $468 a year works out to $39 a month billed annually. That’s a third of what GTOBase’s Spin & Go library alone costs.
The caveat is that GTO Wizard doesn’t publish prices to logged-out visitors — its pricing page redirects into the app. The $468 figure comes from our own last verified check and their public tier announcements rather than a page you can read today, so treat it as the least solid number on this list. Their head-to-head against our app is in GTO Wizard vs GTO Preflop.
Starter also limits you to a single bet size in postflop solutions. If you’re moving off GTOBase because you wanted more postflop depth, price out the higher tiers before assuming Starter is enough.
4. Simple Preflop Hold’em — staying inside the family
GTOBase runs on Simple Poker’s own engines: Simple Preflop Hold’em for preflop, Simple Postflop for postflop. You can skip the browser and buy the engine.
Simple Preflop Hold’em is $250 for a one-year single-PC licence with unlimited preflop calculations, and it solves 2 to 10 players in ChipEV or ICM with rake. That’s genuinely more powerful than any presolved library, because you specify the tree. Simple Postflop is $299 as a one-time licence covering two PCs.
Two things to know. Both are Windows 64-bit only, with no macOS build; Simple Poker’s own guidance is Parallels or Boot Camp. And solving your own preflop trees is a slow, deliberate way to study — it’s a research tool, not something you consult between hands.
What a year costs
The gap is wide enough that it changes what “expensive” means. A year of GTOBase’s Spin & Go library costs about the same as ten years of GTO Preflop Pro. Even the HU Ante library, the cheap one, runs $900 across twelve monthly payments because no annual term is offered for it.
For a high-volume spin regular grinding at stakes where $100 a month is a rounding error, that can still pencil out. For everyone else it’s a hard sell against tools that cost less than a single buy-in at the level most people play. Our MTT stack-size guide covers the depths where those decisions actually get made, with the solved frequencies attached.
What GTOBase still does better
Three things, and they’re not small.
Postflop solutions are the obvious one. GTOBase publishes solved strategies from preflop through the river with, by its own count, over a million solved flops and all 22,100 flops covered for any given spot. GTO Preflop stops at the flop by design, so this isn’t a comparison we win. If postflop browsing is the reason you subscribed, a preflop app won’t replace it.
The hand-history analyzer is the second. Upload a session, and GTOBase compares your actual actions against the solved strategy and flags the biggest EV mistakes, at a claimed 300+ hands a minute. Nothing on this page does that, ours included, and it’s a genuinely good way to find leaks you don’t know you have.
Third, breadth of format. Spin & Go, HU Ante, 8-max and 9-max MTT, HU Cash and 6-max cash from NL50 to NL1000 with rake-specific ranges is a lot of ground, and the 9-max and rake-tiered cash solutions have no equivalent in our app.
Which one should you pick?
You mostly study preflop and want it with you at the table. GTO Preflop, $119.99 a year, and the gap that matters is short-stack tournament coverage GTOBase doesn’t have.
You want charts you own and never pay for again. Preflop+ at $129.99 once.
Postflop browsing is why you subscribed in the first place. GTO Wizard Starter at $468 a year, and check the higher tiers if single-bet-size solutions will bother you.
You want to solve your own trees and you’re on Windows. Simple Preflop Hold’em at $250 a year.
You’re a Spin & Go specialist at stakes where $1,200 doesn’t register. Keep GTOBase. It was built for you, and the free HU Cash library is a real perk. Just don’t expect the phone app to help.
GTOBase alternatives: FAQ
How much does GTOBase cost?
It depends on which library you buy. The Spin & Go library is $150 a month, $400 for three months, or $1,200 a year billed as $100 a month. The HU Ante library is $75 a month with no annual option. HU Cash 50–100bb is free. GTOBase publishes no price for its MTT or 6-Max Cash libraries on the page you can read without an account, checked August 23, 2026.
Is there a GTOBase app for iPhone?
Yes, and it’s old. GTOBase - GTO Poker Train&View was last updated on July 2, 2023 at version 2.09, and holds 3.9 stars from 19 ratings. Its listing still describes the training tool as coming soon. The Google Play link on GTOBase’s own homepage returns a 404.
Is GTOBase the same as Simple Poker?
Effectively, yes. GTOBase is listed among Simple Poker’s own solutions, its support address is support@simplepoker.com, and its solutions are calculated with Simple Preflop Hold’em and Simple Postflop. The iPhone app’s App Store seller is Simple Software Solutions FZE LLC, the company named in simplepoker.com’s footer.
Does GTOBase cover short-stack tournament play?
Not at a full table. Its MTT library covers 8-max at 40–100bb and 9-max at 15–30bb, so there’s no full-ring solution under 15 big blinds. Short stacks appear only in the three-handed Spin & Go library (5–30bb) and the heads-up HU Ante library (5–40bb). GTO Preflop solves MTT continuously from 3 to 100bb at 14 depths, 2 to 8-handed.
Is there a free GTOBase alternative?
Partly. GTOBase itself gives away its HU Cash 50–100bb library. GTO Preflop and Preflop+ are both free to download with paid tiers, and free printable charts still work for a memorizable skeleton. For a full solved tree with training attached, nothing on this page is free.
Sources
- GTOBase.com — library list with stack depths, Spin & Go and HU Ante prices, FAQ on mobile app parity, checked August 23, 2026
- GTOBase on the App Store — version 2.09, last updated July 2, 2023, 3.9/5 from 19 ratings, seller and description, checked August 23, 2026
- Simple Poker Solutions — Simple Postflop $299 one-time licence and product list, checked August 23, 2026
- Simple Preflop Hold’em — $250 one-year single-PC licence, Windows-only requirement, 2–10 player solving, checked August 23, 2026
- Preflop+ on the App Store — $9.99/$79.99/$129.99 in-app purchases, 4.6/5 from 1,018 ratings, version 25.9, checked August 23, 2026
- Preflop+ on Google Play — 4.1/5 from 2.57K reviews, updated June 22, 2026, checked August 23, 2026
- Poker Sciences: preflop range charts for Spin & Go — solver estimate that 70–80% of Spin & Go winnings come from preflop play
- GTO Preflop on the App Store — pricing, device support and the 4.8/240 rating, checked August 23, 2026
- GTO Preflop on Google Play — 4.6/5 from 3.19K reviews, 100K+ downloads, checked August 23, 2026
- Coverage and raise-size figures from GTO Preflop’s own solve database (11,385 decision points, 1,924,065 hand strategies, 503 scenario files); install figures from our Apple Search Ads account, 30 days to August 11, 2026, attributed keyword installs only
All product names, logos and brands are property of their respective owners and are used for identification only. GTO Preflop is not affiliated with or endorsed by Simple Poker, GTOBase, Crafty Wheel Studios or GTO Wizard. Prices verified August 23, 2026 — check each vendor’s listing for current rates.
